perl, 94 bytes

Result

WA

Duration

899ms

Code [DL]

print$a=$b=<>;<>;$c=$_,print$a for<>;$_=$a^$b^$c;s/\^ *K|K *\^/'*'x length($&)/e;tr/5/K/;print

stdin

                                               T  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
             K                                    

stdout

                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
             K                                    

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffc05eb0700 /* 7 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x55e28d7b6d30 /* 7 vars */) = 0
12    execve("/usr/bin/perl", ["/usr/bin/perl", "/volume/CODE"], 0x55e28d7b6d40 /* 7 vars */) = 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=0, si_stime=0} ---
10    +++ exited with 0 +++