rail, 146 bytes

Result

WA

Code [DL]

$ 'j'
 \             /-(!c!)(n)1s{j}(c)#
  \-(!n!)(n)0q<
               \-1a#
$ 'k'
 \             /-(n)1s{k}0#
  \-(!n!)(n)0q<
               \-#

stdin

2495066154483486846921293945031942745008226174294796901457989930057071073506418132102671674634701999

stdout

stderr

Internal Error: Crash: No 'main' function found

strace