verilog, 116 bytes

Result

AC

Duration

1130ms

Code [DL]

module c;reg[56:0]s;initial begin
while($fgets(s,1<<31))$write("%s",s[15:8]-s[23:16]?s[39:32]:s[15:8]);end
endmodule

stdin

699 994
423 721
853 317
538 664
466 643
611 716
276 486
343 991
731 791
186 133
817 715
162 269
949 499
139 331
722 278
517 113
944 532
861 618
755 358
193 386
824 145
899 119
935 655
892 266
822 831
618 158
997 778
862 225
637 343
244 445
155 113
446 348

stdout

9 3 3 6 6 1 6 9 1 6 7 2 9 3 2 1 4 1 5 3 4 1 5 2 2 8 7 2 7 4 1 6 

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffef07910c0 /* 9 vars */) = 0
11    execve("/usr/local/bin/iverilog", ["/usr/local/bin/iverilog", "-o", "/tmp/code", "/volume/CODE"], 0x555c4869dd50 /* 9 vars */) = 0
12    execve("/bin/sh", ["sh", "-c", "/usr/local/lib/ivl/ivlpp  -L -F\""...], 0x7ffcaac8f440 /* 9 vars */) = 0
13    execve("/usr/local/lib/ivl/ivlpp", ["/usr/local/lib/ivl/ivlpp", "-L", "-F/tmp/ivrlg23999c4e2", "-f/tmp/ivrlg3999c4e2", "-p/tmp/ivrli3999c4e2"], 0x5637eaae92a8 /* 9 vars */ <unfinished ...>
14    execve("/usr/local/lib/ivl/ivl", ["/usr/local/lib/ivl/ivl", "-C/tmp/ivrlh3999c4e2", "-C/usr/local/lib/ivl/vvp.conf", "--", "-"], 0x5637eaae9290 /* 9 vars */ <unfinished ...>
13    <... execve resumed>)             = 0
14    <... execve resumed>)             = 0
13    +++ exited with 0 +++
12    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
14    +++ exited with 0 +++
12    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=14, si_uid=0, si_status=0, si_utime=0, si_stime=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} ---
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} ---
16    execve("/tmp/code", ["/tmp/code"], 0x555c4869dcf0 /* 9 vars */ <unfinished ...>
15    execve("/bin/cat", ["cat", "-"], 0x555c4869dd08 /* 9 vars */ <unfinished ...>
16    <... execve resumed>)             = 0
15    <... execve resumed>)             = 0
15    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=15, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
16    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=16, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
17    execve("/bin/rm", ["rm", "/tmp/code"], 0x555c4869dc98 /* 9 vars */) = 0
17    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=17, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
10    +++ exited with 0 +++