rail, 56 bytes

Result

WA

Code [DL]

$ 'x'
 \
  \-(!a!)(!b!)(a)(b)#

$ 'main'
 \
  \-i52mxdo#

stdin

8219367483218110894077550792463143833107428200285899684609001523589642224821454383194273827358829980

stdout

0

stderr

strace