v-vim, 27 bytes

Result

AC

Duration

803ms

Code [DL]

:%s/.*\(.\)\(\1.\| .*\)/\1/

stdin

186 929
637 553
718 218
568 882
783 618
119 932
277 778
533 329
548 984
922 429
452 255
197 959
233 776
348 485
228 824
428 528
878 882
622 913
169 195
942 264
741 426
188 887
477 875
221 227
437 467
644 665
788 813
475 962
741 997
448 483
116 118
488 769

stdout

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

stderr

strace

16    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fffb0424ee0 /* 9 vars */) = 0
17    execve("/bin/cat", ["cat", "-"], 0x560941b2ed00 /* 9 vars */) = 0
17    +++ exited with 0 +++
16    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=17, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
18    execve("/root/V/v", ["/root/V/v", "/volume/CODE", "-f", "/tmp/input"], 0x560941b2ed38 /* 9 vars */) = 0
20    execve("/usr/bin/readlink", ["readlink", "-e", "--", "/root/V/v"], 0x55fe8197bc20 /* 10 vars */) = 0
20    +++ exited with 0 +++
19    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=20, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
19    execve("/usr/bin/dirname", ["dirname", "--", "/root/V/v"], 0x55fe8197b3c0 /* 10 vars */) = 0
19    +++ exited with 0 +++
18    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=19, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
21    execve("/usr/bin/vim", ["vim", "-Nnes", "/tmp/input", "-u", "/root/V/vim/init.vim", "-i", "NONE", "-c", "call Execute_Program('/volume/CO"..., "-c", "%p", "-c", "q!"], 0x55fe8197abc0 /* 11 vars */) = 0
22    execve("/usr/bin/head", ["head", "-c", "-1"], 0x55fe8197abc0 /* 11 vars */) = 0
21    +++ exited with 0 +++
22    +++ exited with 0 +++
18    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=21, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
18    +++ exited with 0 +++
16    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=18, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
16    +++ exited with 0 +++