node, 88 bytes

Result

AC

Duration

864ms

Code [DL]

console.log((""+require("fs").readFileSync(0)).split`
`.map(s=>s[s[1]-s[2]?4:2]).join``)

stdin

964 334
377 461
217 343
468 485
868 168
549 965
966 567
978 786
988 836
699 394
571 881
419 979
394 544
352 582
722 294
933 992
218 137
947 341
822 225
735 554
644 441
158 967
273 778
885 558
118 813
544 553
499 158
171 716
414 116
522 955
869 964
797 119

stdout

37341967898955231325497584971291

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fff76ebc870 /* 7 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x5604a64a1d30 /* 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    execve("/usr/bin/node", ["/usr/bin/node", "/volume/CODE"], 0x5604a64a1d40 /* 7 vars */) = 0
14    +++ exited with 0 +++
15    +++ exited with 0 +++
17    +++ exited with 0 +++
16    +++ exited with 0 +++
13    +++ exited with 0 +++
18    +++ 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=3, si_stime=1} ---
10    +++ exited with 0 +++