powershell, 27 bytes

Result

INVALID

Duration

1722ms

Code [DL]

dd|%{$_[$_[1]-eq$_[2]-or4]}

stdin

266 474
534 461
294 649
687 487
315 152
997 978
411 117
896 558
833 443
988 688
892 321
322 334
737 734
655 558
579 994
533 159
523 757
283 338
638 315
895 687
615 997
511 161
668 632
688 866
883 885
553 892
367 966
276 695
813 113
569 968
522 925
142 636

stdout

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

stderr

0+1 records in
0+1 records out
256 bytes copied, 0.00106813 s, 240 kB/s

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fffab4b50e0 /* 6 vars */) = 0
13    execve("/usr/bin/pwsh", ["/usr/bin/pwsh", "/volume/CODE"], 0x55da63a70c28 /* 6 vars */) = 0
12    execve("/bin/cat", ["cat", "-"], 0x55da63a70c10 /* 6 vars */) = 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} ---
16    +++ exited with 0 +++
17    +++ exited with 0 +++
13    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=16, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
34    execve("/bin/dd", ["/bin/dd"], 0x7f98cc009cb0 /* 7 vars */) = 0
34    +++ exited with 0 +++
32    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=34, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
32    +++ exited with 0 +++
33    +++ exited with 0 +++
30    +++ exited with 0 +++
29    +++ exited with 0 +++
31    +++ exited with 0 +++
28    +++ exited with 0 +++
27    +++ exited with 0 +++
26    +++ exited with 0 +++
25    +++ exited with 0 +++
24    +++ exited with 0 +++
23    +++ exited with 0 +++
21    +++ exited with 0 +++
22    +++ exited with 0 +++
20    +++ exited with 0 +++
19    +++ exited with 0 +++
18    +++ exited with 0 +++
15    +++ exited with 0 +++
14    +++ exited with 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=38, si_stime=20} ---
11    +++ exited with 0 +++