ruby, 46 bytes

Result

AC

Duration

913ms

Code [DL]

a,*,c=*$<;$><<a*~-$.+(c[/ +/]+$0*9)[0..a=~/T/]

stdin

                                 T                
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                      K                           

stdout

                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                                 T                
                      /volume/CODE

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffd5e3dc600 /* 9 vars */) = 0
12    execve("/usr/local/ruby-2.6.3/bin/ruby", ["/usr/local/ruby-2.6.3/bin/ruby", "/volume/CODE"], 0x561eefb22d60 /* 9 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x561eefb22d40 /* 9 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=7, si_stime=4} ---
10    +++ exited with 0 +++