llvm-ir, 140 bytes

Result

WA

Duration

534ms

Code [DL]

define i32 @main() {
  %1 = alloca i8, align 1
  call i32 @getchar(i8* %1)
  ret i32 0
}

declare i32 @putchar(i8)
declare i32 @getchar(i8*)

stdin

40 17 41
09 20 51
61 77 75
22 47 05

stdout

stderr

strace