make, 168 bytes

Result

WA

Duration

882ms

Code [DL]

1=$(STDIN)
f=$(if $1,$(word $(words $(sort $(wordlist 1,3,$1)) _),$1)$(call f,$(wordlist 7,999,$1)))
a:;$(foreach d,1 2 3 4 5 6 7 8 9,$(eval 1:=$$(subst $d, $d,$$1)))$f

stdin

858 788
194 884
911 662
521 163
451 199
178 789
611 226
144 863
697 774
788 882
847 746
672 478
277 472
673 793
277 262
233 139
834 299
841 118
292 394
522 229
638 383
599 967
537 351
989 694
339 339
799 944
548 433
663 144
447 742
382 446
176 771
381 594

stdout

88111714787477732122393999437475

stderr

make: 88111714787477732122393999437475: No such file or directory
make: *** [/volume/CODE:3: a] Error 127

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fff861c2e70 /* 7 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x55d44d908028 /* 7 vars */ <unfinished ...>
12    execve("/usr/bin/ag_launcher", ["/usr/bin/ag_launcher", "-i", "/usr/bin/make", "-f", "/volume/CODE"], 0x55d44d9080a8 /* 7 vars */ <unfinished ...>
11    <... execve resumed>)             = 0
12    <... execve resumed>)             = 0
12    execve("/usr/bin/make", ["/usr/bin/make", "-f", "/volume/CODE"], 0x558968b77da0 /* 8 vars */ <unfinished ...>
11    +++ exited with 0 +++
12    <... execve resumed>)             = 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 2 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=2, si_utime=0, si_stime=0} ---
10    +++ exited with 2 +++