% the following fixes are taken verbatim from xgreek.sty:
\global\lccode"0386="03AC \global\uccode"0386="0391
\global\lccode"0388="03AD \global\uccode"0388="0395
\global\lccode"0389="03AC \global\uccode"0389="0397
\global\lccode"038A="03AF \global\uccode"038A="0399
\global\lccode"038C="03CC \global\uccode"038C="039F
\global\lccode"038E="03CD \global\uccode"038E="03A5
\global\lccode"038F="03CE \global\uccode"038F="03A9
\global\lccode"0390="0390 \global\uccode"0390="03AA
\global\lccode"0391="03B1 \global\uccode"0391="0391
\global\lccode"0392="03B2 \global\uccode"0392="0392
\global\lccode"0393="03B3 \global\uccode"0393="0393
\global\lccode"0394="03B4 \global\uccode"0394="0394
\global\lccode"0395="03B5 \global\uccode"0395="0395
\global\lccode"0396="03B6 \global\uccode"0396="0396
\global\lccode"0397="03B7 \global\uccode"0397="0397
\global\lccode"0398="03B8 \global\uccode"0398="0398
\global\lccode"0399="03B9 \global\uccode"0399="0399
\global\lccode"039A="03BA \global\uccode"039A="039A
\global\lccode"039B="03BB \global\uccode"039B="039B
\global\lccode"039C="03BC \global\uccode"039C="039C
\global\lccode"039D="03BD \global\uccode"039D="039D
\global\lccode"039E="03BE \global\uccode"039E="039E
\global\lccode"039F="03BF \global\uccode"039F="039F
\global\lccode"03A0="03C0 \global\uccode"03A0="03A0
\global\lccode"03A1="03C1 \global\uccode"03A1="03A1
\global\lccode"03A3="03C3 \global\uccode"03A3="03A3
\global\lccode"03A4="03C4 \global\uccode"03A4="03A4
\global\lccode"03A5="03C5 \global\uccode"03A5="03A5
\global\lccode"03A6="03C6 \global\uccode"03A6="03A6
\global\lccode"03A7="03C7 \global\uccode"03A7="03A7
\global\lccode"03A8="03C8 \global\uccode"03A8="03A8
\global\lccode"03A9="03C9 \global\uccode"03A9="03A9
\global\lccode"03AA="03CA \global\uccode"03AA="03AA
\global\lccode"03AB="03CB \global\uccode"03AB="03AB
\global\lccode"03AC="03AC \global\uccode"03AC="0391
\global\lccode"03AD="03AD \global\uccode"03AD="0395
\global\lccode"03AE="03AE \global\uccode"03AE="0397
\global\lccode"03AF="03AF \global\uccode"03AF="0399
\global\lccode"03B0="03B0 \global\uccode"03B0="03AB
\global\lccode"03B1="03B1 \global\uccode"03B1="0391
\global\lccode"03B2="03B2 \global\uccode"03B2="0392
\global\lccode"03B3="03B3 \global\uccode"03B3="0393
\global\lccode"03B4="03B4 \global\uccode"03B4="0394
\global\lccode"03B5="03B5 \global\uccode"03B5="0395
\global\lccode"03B6="03B6 \global\uccode"03B6="0396
\global\lccode"03B7="03B7 \global\uccode"03B7="0397
\global\lccode"03B8="03B8 \global\uccode"03B8="0398
\global\lccode"03B9="03B9 \global\uccode"03B9="0399
\global\lccode"03BA="03BA \global\uccode"03BA="039A
\global\lccode"03BB="03BB \global\uccode"03BB="039B
\global\lccode"03BC="03BC \global\uccode"03BC="039C
\global\lccode"03BD="03BD \global\uccode"03BD="039D
\global\lccode"03BE="03BE \global\uccode"03BE="039E
\global\lccode"03BF="03BF \global\uccode"03BF="039F
\global\lccode"03C0="03C0 \global\uccode"03C0="03A0
\global\lccode"03C1="03C1 \global\uccode"03C1="03A1
\global\lccode"03C2="03C2 \global\uccode"03C2="03A3
\global\lccode"03C3="03C3 \global\uccode"03C3="03A3
\global\lccode"03C4="03C4 \global\uccode"03C4="03A4
\global\lccode"03C5="03C5 \global\uccode"03C5="03A5
\global\lccode"03C6="03C6 \global\uccode"03C6="03A6
\global\lccode"03C7="03C7 \global\uccode"03C7="03A7
\global\lccode"03C8="03C8 \global\uccode"03C8="03A8
\global\lccode"03C9="03C9 \global\uccode"03C9="03A9
\global\lccode"03CA="03CA \global\uccode"03CA="03AA
\global\lccode"03CB="03CB \global\uccode"03CB="03AB
\global\lccode"03CC="03CC \global\uccode"03CC="039F
\global\lccode"03CD="03CD \global\uccode"03CD="03A5
\global\lccode"03CE="03CE \global\uccode"03CE="03A9
\global\lccode"03D0="03D0 \global\uccode"03D0="0392
\global\lccode"03D1="03D1 \global\uccode"03D1="0398
\global\lccode"03D2="03C5 \global\uccode"03D2="03A5
\global\lccode"03D3="03CD \global\uccode"03D3="03A5
\global\lccode"03D4="03CB \global\uccode"03D4="03AB
\global\lccode"03D5="03C6 \global\uccode"03D5="03A6
\global\lccode"03D6="03C0 \global\uccode"03D6="03A0
\global\lccode"03DA="03DB \global\uccode"03DA="03DA
\global\lccode"03DB="03DB \global\uccode"03DB="03DA
\global\lccode"03DC="03DD \global\uccode"03DC="03DC
\global\lccode"03DD="03DD \global\uccode"03DD="03DC
\global\lccode"03DE="03DF \global\uccode"03DE="03DE
\global\lccode"03DF="03DF \global\uccode"03DF="03DE
\global\lccode"03E0="03E1 \global\uccode"03E0="039A
\global\lccode"03E0="03E1 \global\uccode"03E1="03A1
\global\lccode"03F0="03BA \global\uccode"03F0="039A
\global\lccode"03F1="03C1 \global\uccode"03F1="03A1
\global\lccode"03F2="03F2 \global\uccode"03F2="03F9
\global\lccode"03F9="03F2 \global\uccode"03F9="03F9
\global\lccode"1F00="1F00 \global\uccode"1F00="0391
\global\lccode"1F01="1F01 \global\uccode"1F01="0391
\global\lccode"1F02="1F02 \global\uccode"1F02="0391
\global\lccode"1F03="1F03 \global\uccode"1F03="0391
\global\lccode"1F04="1F04 \global\uccode"1F04="0391
\global\lccode"1F05="1F05 \global\uccode"1F05="0391
\global\lccode"1F06="1F06 \global\uccode"1F06="0391
\global\lccode"1F07="1F07 \global\uccode"1F07="0391
\global\lccode"1F08="1F00 \global\uccode"1F08="0391
\global\lccode"1F09="1F01 \global\uccode"1F09="0391
\global\lccode"1F0A="1F02 \global\uccode"1F0A="0391
\global\lccode"1F0B="1F03 \global\uccode"1F0B="0391
\global\lccode"1F0C="1F04 \global\uccode"1F0C="0391
\global\lccode"1F0D="1F05 \global\uccode"1F0D="0391
\global\lccode"1F0E="1F06 \global\uccode"1F0E="0391
\global\lccode"1F0F="1F07 \global\uccode"1F0F="0391
\global\lccode"1F10="1F10 \global\uccode"1F10="0395
\global\lccode"1F11="1F11 \global\uccode"1F11="0395
\global\lccode"1F12="1F12 \global\uccode"1F12="0395
\global\lccode"1F13="1F13 \global\uccode"1F13="0395
\global\lccode"1F14="1F14 \global\uccode"1F14="0395
\global\lccode"1F15="1F15 \global\uccode"1F15="0395
\global\lccode"1F18="1F10 \global\uccode"1F18="0395
\global\lccode"1F19="1F11 \global\uccode"1F19="0395
\global\lccode"1F1A="1F12 \global\uccode"1F1A="0395
\global\lccode"1F1B="1F13 \global\uccode"1F1B="0395
\global\lccode"1F1C="1F14 \global\uccode"1F1C="0395
\global\lccode"1F1D="1F15 \global\uccode"1F1D="0395
\global\lccode"1F20="1F20 \global\uccode"1F20="0397
\global\lccode"1F21="1F21 \global\uccode"1F21="0397
\global\lccode"1F22="1F22 \global\uccode"1F22="0397
\global\lccode"1F23="1F23 \global\uccode"1F23="0397
\global\lccode"1F24="1F24 \global\uccode"1F24="0397
\global\lccode"1F25="1F25 \global\uccode"1F25="0397
\global\lccode"1F26="1F26 \global\uccode"1F26="0397
\global\lccode"1F27="1F27 \global\uccode"1F27="0397
\global\lccode"1F28="1F20 \global\uccode"1F28="0397
\global\lccode"1F29="1F21 \global\uccode"1F29="0397
\global\lccode"1F2A="1F22 \global\uccode"1F2A="0397
\global\lccode"1F2B="1F23 \global\uccode"1F2B="0397
\global\lccode"1F2C="1F24 \global\uccode"1F2C="0397
\global\lccode"1F2D="1F25 \global\uccode"1F2D="0397
\global\lccode"1F2E="1F26 \global\uccode"1F2E="0397
\global\lccode"1F2F="1F27 \global\uccode"1F2F="0397
\global\lccode"1F30="1F30 \global\uccode"1F30="0399
\global\lccode"1F31="1F31 \global\uccode"1F31="0399
\global\lccode"1F32="1F32 \global\uccode"1F32="0399
\global\lccode"1F33="1F33 \global\uccode"1F33="0399
\global\lccode"1F34="1F34 \global\uccode"1F34="0399
\global\lccode"1F35="1F35 \global\uccode"1F35="0399
\global\lccode"1F36="1F36 \global\uccode"1F36="0399
\global\lccode"1F37="1F37 \global\uccode"1F37="0399
\global\lccode"1F38="1F30 \global\uccode"1F38="0399
\global\lccode"1F39="1F31 \global\uccode"1F39="0399
\global\lccode"1F3A="1F32 \global\uccode"1F3A="0399
\global\lccode"1F3B="1F33 \global\uccode"1F3B="0399
\global\lccode"1F3C="1F34 \global\uccode"1F3C="0399
\global\lccode"1F3D="1F35 \global\uccode"1F3D="0399
\global\lccode"1F3E="1F36 \global\uccode"1F3E="0399
\global\lccode"1F3F="1F37 \global\uccode"1F3F="0399
\global\lccode"1F40="1F40 \global\uccode"1F40="039F
\global\lccode"1F41="1F41 \global\uccode"1F41="039F
\global\lccode"1F42="1F42 \global\uccode"1F42="039F
\global\lccode"1F43="1F43 \global\uccode"1F43="039F
\global\lccode"1F44="1F44 \global\uccode"1F44="039F
\global\lccode"1F45="1F45 \global\uccode"1F45="039F
\global\lccode"1F48="1F40 \global\uccode"1F48="039F
\global\lccode"1F49="1F41 \global\uccode"1F49="039F
\global\lccode"1F4A="1F42 \global\uccode"1F4A="039F
\global\lccode"1F4B="1F43 \global\uccode"1F4B="039F
\global\lccode"1F4C="1F44 \global\uccode"1F4C="039F
\global\lccode"1F4D="1F45 \global\uccode"1F4D="039F
\global\lccode"1F50="1F50 \global\uccode"1F50="03A5
\global\lccode"1F51="1F51 \global\uccode"1F51="03A5
\global\lccode"1F52="1F52 \global\uccode"1F52="03A5
\global\lccode"1F53="1F53 \global\uccode"1F53="03A5
\global\lccode"1F54="1F54 \global\uccode"1F54="03A5
\global\lccode"1F55="1F55 \global\uccode"1F55="03A5
\global\lccode"1F56="1F56 \global\uccode"1F56="03A5
\global\lccode"1F57="1F57 \global\uccode"1F57="03A5
\global\lccode"1F59="1F51 \global\uccode"1F59="03A5
\global\lccode"1F5B="1F53 \global\uccode"1F5B="03A5
\global\lccode"1F5D="1F55 \global\uccode"1F5D="03A5
\global\lccode"1F5F="1F57 \global\uccode"1F5F="03A5
\global\lccode"1F60="1F60 \global\uccode"1F60="03A9
\global\lccode"1F61="1F61 \global\uccode"1F61="03A9
\global\lccode"1F62="1F62 \global\uccode"1F62="03A9
\global\lccode"1F63="1F63 \global\uccode"1F63="03A9
\global\lccode"1F64="1F64 \global\uccode"1F64="03A9
\global\lccode"1F65="1F65 \global\uccode"1F65="03A9
\global\lccode"1F66="1F66 \global\uccode"1F66="03A9
\global\lccode"1F67="1F67 \global\uccode"1F67="03A9
\global\lccode"1F68="1F60 \global\uccode"1F68="03A9
\global\lccode"1F69="1F61 \global\uccode"1F69="03A9
\global\lccode"1F6A="1F62 \global\uccode"1F6A="03A9
\global\lccode"1F6B="1F63 \global\uccode"1F6B="03A9
\global\lccode"1F6C="1F64 \global\uccode"1F6C="03A9
\global\lccode"1F6D="1F65 \global\uccode"1F6D="03A9
\global\lccode"1F6E="1F66 \global\uccode"1F6E="03A9
\global\lccode"1F6F="1F67 \global\uccode"1F6F="03A9
\global\lccode"1F70="1F70 \global\uccode"1F70="0391
\global\lccode"1F71="1F71 \global\uccode"1F71="0391
\global\lccode"1F72="1F72 \global\uccode"1F72="0395
\global\lccode"1F73="1F73 \global\uccode"1F73="0395
\global\lccode"1F74="1F74 \global\uccode"1F74="0397
\global\lccode"1F75="1F75 \global\uccode"1F75="0397
\global\lccode"1F76="1F76 \global\uccode"1F76="0399
\global\lccode"1F77="1F77 \global\uccode"1F77="0399
\global\lccode"1F78="1F78 \global\uccode"1F78="039F
\global\lccode"1F79="1F79 \global\uccode"1F79="039F
\global\lccode"1F7A="1F7A \global\uccode"1F7A="03A5
\global\lccode"1F7B="1F7B \global\uccode"1F7B="03A5
\global\lccode"1F7C="1F7C \global\uccode"1F7C="03A9
\global\lccode"1F7D="1F7D \global\uccode"1F7D="03A9
\global\lccode"1F80="1F80 \global\uccode"1F80="1FBC
\global\lccode"1F81="1F81 \global\uccode"1F81="1FBC
\global\lccode"1F82="1F82 \global\uccode"1F82="1FBC
\global\lccode"1F83="1F83 \global\uccode"1F83="1FBC
\global\lccode"1F84="1F84 \global\uccode"1F84="1FBC
\global\lccode"1F85="1F85 \global\uccode"1F85="1FBC
\global\lccode"1F86="1F86 \global\uccode"1F86="1FBC
\global\lccode"1F87="1F87 \global\uccode"1F87="1FBC
\global\lccode"1F88="1F80 \global\uccode"1F88="1FBC
\global\lccode"1F89="1F81 \global\uccode"1F89="1FBC
\global\lccode"1F8A="1F82 \global\uccode"1F8A="1FBC
\global\lccode"1F8B="1F83 \global\uccode"1F8B="1FBC
\global\lccode"1F8C="1F84 \global\uccode"1F8C="1FBC
\global\lccode"1F8D="1F85 \global\uccode"1F8D="1FBC
\global\lccode"1F8E="1F86 \global\uccode"1F8E="1FBC
\global\lccode"1F8F="1F87 \global\uccode"1F8F="1FBC
\global\lccode"1F90="1F90 \global\uccode"1F90="1FCC
\global\lccode"1F91="1F91 \global\uccode"1F91="1FCC
\global\lccode"1F92="1F92 \global\uccode"1F92="1FCC
\global\lccode"1F93="1F93 \global\uccode"1F93="1FCC
\global\lccode"1F94="1F94 \global\uccode"1F94="1FCC
\global\lccode"1F95="1F95 \global\uccode"1F95="1FCC
\global\lccode"1F96="1F96 \global\uccode"1F96="1FCC
\global\lccode"1F97="1F97 \global\uccode"1F97="1FCC
\global\lccode"1F98="1F90 \global\uccode"1F98="1FCC
\global\lccode"1F99="1F91 \global\uccode"1F99="1FCC
\global\lccode"1F9A="1F92 \global\uccode"1F9A="1FCC
\global\lccode"1F9B="1F93 \global\uccode"1F9B="1FCC
\global\lccode"1F9C="1F94 \global\uccode"1F9C="1FCC
\global\lccode"1F9D="1F95 \global\uccode"1F9D="1FCC
\global\lccode"1F9E="1F96 \global\uccode"1F9E="1FCC
\global\lccode"1F9F="1F97 \global\uccode"1F9F="1FCC
\global\lccode"1FA0="1FA0 \global\uccode"1FA0="1FFC
\global\lccode"1FA1="1FA1 \global\uccode"1FA1="1FFC
\global\lccode"1FA2="1FA2 \global\uccode"1FA2="1FFC
\global\lccode"1FA3="1FA3 \global\uccode"1FA3="1FFC
\global\lccode"1FA4="1FA4 \global\uccode"1FA4="1FFC
\global\lccode"1FA5="1FA5 \global\uccode"1FA5="1FFC
\global\lccode"1FA6="1FA6 \global\uccode"1FA6="1FFC
\global\lccode"1FA7="1FA7 \global\uccode"1FA7="1FFC
\global\lccode"1FA8="1FA0 \global\uccode"1FA8="1FFC
\global\lccode"1FA9="1FA1 \global\uccode"1FA9="1FFC
\global\lccode"1FAA="1FA2 \global\uccode"1FAA="1FFC
\global\lccode"1FAB="1FA3 \global\uccode"1FAB="1FFC
\global\lccode"1FAC="1FA4 \global\uccode"1FAC="1FFC
\global\lccode"1FAD="1FA5 \global\uccode"1FAD="1FFC
\global\lccode"1FAE="1FA6 \global\uccode"1FAE="1FFC
\global\lccode"1FAF="1FA7 \global\uccode"1FAF="1FFC
\global\lccode"1FB0="1FB0 \global\uccode"1FB0="1FB8
\global\lccode"1FB1="1FB1 \global\uccode"1FB1="1FB9
\global\lccode"1FB2="1FB2 \global\uccode"1FB2="1FBC
\global\lccode"1FB3="1FB3 \global\uccode"1FB3="1FBC
\global\lccode"1FB4="1FB4 \global\uccode"1FB4="1FBC
\global\lccode"1FB6="1FB6 \global\uccode"1FB6="0391
\global\lccode"1FB7="1FB7 \global\uccode"1FB7="1FBC
\global\lccode"1FB8="1FB0 \global\uccode"1FB8="1FB8
\global\lccode"1FB9="1FB1 \global\uccode"1FB9="1FB9
\global\lccode"1FBA="1F70 \global\uccode"1FBA="0391
\global\lccode"1FBB="1F71 \global\uccode"1FBB="0391
\global\lccode"1FBC="1FB3 \global\uccode"1FBC="1FBC
\global\lccode"1FBD="1FBD \global\uccode"1FBD="1FBD
\global\lccode"1FC2="1FC2 \global\uccode"1FC2="1FCC
\global\lccode"1FC3="1FC3 \global\uccode"1FC3="1FCC
\global\lccode"1FC4="1FC4 \global\uccode"1FC4="1FCC
\global\lccode"1FC6="1FC6 \global\uccode"1FC6="0397
\global\lccode"1FC7="1FC7 \global\uccode"1FC7="1FCC
\global\lccode"1FC8="1F72 \global\uccode"1FC8="0395
\global\lccode"1FC9="1F73 \global\uccode"1FC9="0395
\global\lccode"1FCA="1F74 \global\uccode"1FCA="0397
\global\lccode"1FCB="1F75 \global\uccode"1FCB="0397
\global\lccode"1FCC="1FC3 \global\uccode"1FCC="1FCC
\global\lccode"1FD0="1FD0 \global\uccode"1FD0="1FD8
\global\lccode"1FD1="1FD1 \global\uccode"1FD1="1FD9
\global\lccode"1FD2="1FD2 \global\uccode"1FD2="03AA
\global\lccode"1FD3="1FD3 \global\uccode"1FD3="03AA
\global\lccode"1FD6="1FD6 \global\uccode"1FD6="0399
\global\lccode"1FD7="1FD7 \global\uccode"1FD7="03AA
\global\lccode"1FD8="1FD0 \global\uccode"1FD8="1FD8
\global\lccode"1FD9="1FD1 \global\uccode"1FD9="1FD9
\global\lccode"1FDA="1F76 \global\uccode"1FDA="0399
\global\lccode"1FDB="1F77 \global\uccode"1FDB="0399
\global\lccode"1FE0="1FE0 \global\uccode"1FE0="1FE8
\global\lccode"1FE1="1FE1 \global\uccode"1FE1="1FE9
\global\lccode"1FE2="1FE2 \global\uccode"1FE2="03AB
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