make, 172 bytes

Result

INVALID

Duration

793ms

Code [DL]

SHELL=/bin/bash
X=$(shell echo $(STDIN)|tr -d ' '|fold -w 6|while read li; do [ $${li:1:1} = $${li:2:1} ]&&aa=1||aa=3;echo "$${li:$$aa:1}";done)
$(foreach i,$X, $(info $i))

stdin

168 486
927 771
928 287
544 994
873 363
355 954
726 936
166 664
695 771
715 152
611 171
833 689
644 447
374 775
671 172
687 881
211 154
618 161
722 929
581 558
388 663
914 211
234 443
678 174
154 476
314 892
213 466
188 993
127 217
976 266
711 258
393 391

stdout

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

stderr

make: *** No targets.  Stop.

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffdd47d0da0 /* 7 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x55f22a9de028 /* 7 vars */ <unfinished ...>
12    execve("/usr/bin/ag_launcher", ["/usr/bin/ag_launcher", "-i", "/usr/bin/make", "-f", "/volume/CODE"], 0x55f22a9de0a8 /* 7 vars */ <unfinished ...>
11    <... execve resumed>)             = 0
12    <... execve resumed>)             = 0
12    execve("/usr/bin/make", ["/usr/bin/make", "-f", "/volume/CODE"], 0x557979618da0 /* 8 vars */ <unfinished ...>
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 resumed>)             = 0
13    execve("/bin/bash", ["/bin/bash", "-c", "echo 168 486927 771928 287544 99"...], 0x7ffcd94af4a8 /* 8 vars */) = 0
14    +++ exited with 0 +++
15    execve("/usr/bin/tr", ["tr", "-d", " "], 0x564e9e06fbc0 /* 9 vars */) = 0
15    +++ exited with 0 +++
16    execve("/usr/bin/fold", ["fold", "-w", "6"], 0x564e9e06fbc0 /* 9 vars */) = 0
16    +++ exited with 0 +++
17    +++ exited with 0 +++
13    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=14, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
13    +++ exited with 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 +++