gs2, 25 bytes

Result

AC

Duration

942ms

Code [DL]

00000000  07 4b c8 33 0e 2e d0 32  30 07 54 33 0e d0 42 01  |.K.3...20.T3..B.|
00000010  33 33 27 50 fe 27 50 d0  30                       |33'P.'P.0|
00000019

stdin

                     T                            
                                                  
                                                  
       K                                          

stdout

                     K                            
                     K                            
                     K                            
       KKKKKKKKKKKKKKK

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fffb9489670 /* 7 vars */) = 0
12    execve("/usr/bin/python", ["/usr/bin/python", "/root/gs2.py", "/volume/CODE"], 0x55c336a75068 /* 7 vars */ <unfinished ...>
11    execve("/bin/cat", ["cat", "-"], 0x55c334ce8d60 /* 7 vars */ <unfinished ...>
12    <... execve resumed> )            = 0
11    <... execve resumed> )            = 0
11    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=11, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
12    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=5, si_stime=4} ---
10    +++ exited with 0 +++