.S F=N
.S N=13
.!LOOK
.!HERE
!LOOK
.!CLRT
.P "You are at a branch in the tunnel.
.I GE(6):2
.T P "Passages go to the left, right,
.I GE(6):7
.T P "Passages go forward, to the right,
.I GE(6):6
.T P "Passages go forward, to the left,
.P "and back behind you.
%L...
.!CLRT
.I F#16
.T J +3
.!INVD
!!!!!
.P "You turn down the left passage.
.I F:14
.T !GT15
.E !GT16
.!TUNL
%R...
.!CLRT
.I F#14
.T J +3
.!INVD
!!!!!
.P "You turn down the right passage.
.I F:15
.T !GT14
.E !GT15
.!TUNL
%FW..
.!CLRT
.I F#15
.T J +3
.!INVD
!!!!!
.P "You continue forward.
.I F:14
.T !GT16
.E !GT14
.!TUNL
%BK..
.!CLRT
.P "You turn around and trudge back down
.P "the passage.
.I F:14
.T !GT14
.I F:15
.T !GT15
.I F:16
.T !GT16
.!TUNL
!GT14
.3 ROOM 14.0 
.S GE(6)=0
!GT15
.3 ROOM 15.0 
.S GE(6)=0
!GT16
.3 ROOM 16.0 
.S GE(6)=20
@@@@@