by@__dAi00
WA
$ 'main'
\ /---o#
\-0(!x!)--i-{i}--e{~}<
@---/ \
\------------------@
$ 'i'
\ /-(!q!)(b)a#
\-1(!b!)0(!c!)--{d}(c)q{~}<
/ \
@--m(!b!)------/ \
\--[0001]----(b)(!c!)a1(c)----@
$ 'd' (dup)
\-(!d!)(d)(d)#
$ '~'
\
| /-t-\ #
| / \|
\-< |
\ /|
\-f-/ @7577137273775133431101072797767020366135317995158573554762885039851503462973760915541758678291640903
Crash: No valid move