lua, 61 bytes

Result

AC

Duration

783ms

Code [DL]

::x::z,a,b=io.read(1,2,2,3)print(a%11>0 and b or~~a%10)goto x

stdin

191 964
576 369
842 422
158 224
466 866
988 587
266 568
199 997
553 932
472 468
167 847
956 658
274 441
242 445
984 484
377 443
499 765
933 377
494 557
229 935
856 562
483 338
144 473
625 921
532 332
316 718
622 558
977 364
499 991
326 815
932 371
584 425

stdout

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

stderr

/usr/bin/lua5.3: /volume/CODE:1: attempt to perform arithmetic on a nil value (global 'a')
stack traceback:
	/volume/CODE:1: in main chunk
	[C]: in ?

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffc3391a910 /* 7 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x55ccc3b29d30 /* 7 vars */) = 0
12    execve("/usr/bin/lua5.3", ["/usr/bin/lua5.3", "/volume/CODE"], 0x55ccc3b29d40 /* 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    +++ exited with 1 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=1, si_utime=0, si_stime=0} ---
10    +++ exited with 1 +++