powershell, 28 bytes

Result

INVALID

Duration

1756ms

Code [DL]

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

stdin

683 886
987 445
466 891
736 145
461 122
155 544
199 996
511 216
188 334
944 314
315 525
257 573
757 348
159 998
653 854
592 992
461 866
448 782
711 992
363 366
989 331
993 931
468 862
914 193
339 645
122 221
289 994
229 397
622 328
577 721
817 114
856 542

stdout

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

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffc49246590 /* 6 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x56467db49c10 /* 6 vars */) = 0
12    execve("/usr/bin/pwsh", ["/usr/bin/pwsh", "/volume/CODE"], 0x56467db49c28 /* 6 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} ---
15    +++ exited with 0 +++
16    +++ exited with 0 +++
12    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=15, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
33    execve("/bin/cat", ["/bin/cat"], 0x7f4008021cf0 /* 7 vars */) = 0
33    +++ exited with 0 +++
31    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=33, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
31    +++ exited with 0 +++
32    +++ exited with 0 +++
30    +++ exited with 0 +++
29    +++ 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 +++
22    +++ exited with 0 +++
20    +++ exited with 0 +++
21    +++ exited with 0 +++
19    +++ exited with 0 +++
18    +++ exited with 0 +++
17    +++ exited with 0 +++
14    +++ exited with 0 +++
13    +++ exited with 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=42, si_stime=18} ---
10    +++ exited with 0 +++