.S F=N
.S N=109
.!LOOK
.!HERE
!LOOK
.!CLRT
.P "You are at a branch in the tunnel.
.I F:46
.T P "Passages go to the left, right,
.I F:107
.T P "Passages go forward, to the right,
.I F:45
.T P "Passages go forward, to the left,
.P "and back behind you.
%L...
.!CLRT
.I F#107
.T J +3
.!INVD
!!!!!
.P "You turn down the left passage.
.I F:45
.T !GT46
.I F:46
.T !GTO7
.!TUNL
%R...
.!CLRT
.I F#45
.T J +3
.!INVD
!!!!!
.P "You turn down the right passage.
.I F:107
.T !GT46
.I F:46
.T !GT45
.!TUNL
%FW..
.!CLRT
.I F#46
.T J +3
.!INVD
!!!!!
.P "You continue forward.
.I F:107
.T !GT45
.I F:45
.T !GTO7
.!TUNL
%BK..
.!CLRT
.P "You turn around and trudge back down
.P "the passage.
.I F:107
.T !GTO7
.I F:45
.T !GT45
.I F:46
.T !GT46
.!TUNL
!GTO7
.3 ROOM 44.7 
.S GE(6)=12
!GT45
.3 ROOM 45.0 
.S GE(6)=3
!GT46
.3 ROOM 46.0 
.S GE(6)=0
@@@@@