fish, 59 bytes

Result

WA

Code [DL]

v
>i:1+   ?v86*>:0g:?!;>$:o$ v
^p0$+1g0:<   ^+1    ~^?n:-1<

stdin

5840353463089704408422359743050887821140747848439352794679536078933907065857428823641519453340819628

stdout

010

stderr

something smells fishy...

strace