vim, 170 bytes

Result

WA

Code [DL]

gg
dd
10p
gg
:2,2s/[^0]//g
:3,3s/[^1]//g
:4,4s/[^2]//g
:5,5s/[^3]//g
:6,6s/[^4]//g
:7,7s/[^5]//g
:8,8s/[^6]//g
:9,9s/[^7]//g
:10,10s/[^8]//g
:11,11s/[^9]//g
:%s/\n//g
:wq

Disassembly

gg<NL>dd<NL>10p<NL>gg<NL>:2,2s/[^0]//g<NL>:3,3s/[^1]//g<NL>:4,4s/[^2]//g<NL>:5,5s/[^3]//g<NL>:6,6s/[^4]//g<NL>:7,7s/[^5]//g<NL>:8,8s/[^6]//g<NL>:9,9s/[^7]//g<NL>:10,10s/[^8]//g<NL>:11,11s/[^9]//g<NL>:%s/\n//g<NL>:wq

stdin

7955656084682308360600641653124647393375878489809708304569950608739072873086448308586266114570347197

stdout

7955656084682308360600641653124647393375878489809708304569950608739072873086448308586266114570347197

stderr

strace