goruby, 39 bytes

Result

WA

Duration

949ms

Code [DL]

$_,*b,c=*$<;s$_*-~$.,c.rs.lj(~/T/+1,?a)

stdin

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                 K                                

stdout

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                 Kaaaaaaaaaaaaaaaaa

stderr

<internal:golf_prelude>:4: warning: redefining Object#method_missing may cause infinite loop

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffe5947e6d0 /* 9 vars */) = 0
12    execve("/bin/cat", ["cat", "-"], 0x555750709d30 /* 9 vars */ <unfinished ...>
13    execve("/root/goruby", ["/root/goruby", "/volume/CODE"], 0x555750709d40 /* 9 vars */ <unfinished ...>
12    <... execve resumed> )            = 0
13    <... execve resumed> )            = 0
12    +++ exited with 0 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
13    +++ exited with 0 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13, si_uid=0, si_status=0, si_utime=9, si_stime=2} ---
11    +++ exited with 0 +++