name: Chapter 7 Vents
NNNNNNNNNNNNNNNNNNNNN
N+++++++++++++++++++N
N+N+NNNNNNNNN+NNNNN+N
NNN+N+NNNNNNN+N+++++N
N+++++++++++++N+NN+NN
N+NNNNN+NNNNN+N+N++NN
N+++++N+N+N+++N+N+NNN
NNNNN+N+N+++NNN+N+++N
N+++N+N+NNN+N+N+N+NNN
NNN+N+N+++N+N+N+N+++N
N+++N+NNN+N+++++N+NNN
NNN+++N+N+NNNNN+N+++N
NQN+NNN+N+NNN+N+NNN+N
N+N+++++N+++N+N+++N+N
N+N+NNNNNNN+N+NNN+N+N
N+N+++++++N+N+++++N+N
N+NNNNNNN+N+N+NNNNN+@
N+++++N+++N+N+N+++N+N
N+NNNNN+NNN+NNN+N+N+N
N+++++++++N+++++N+++N
NNNNNNNNNNNNNNNNNNNNN