C code - 5 lines

Link:

C, pasted on Jun 5:

main(){
    char x = 'X', y = 'Y';
    printf("%d\n", scanf("%c%c", &x, &y));
    printf("%x %x", x, y);
}

Output:

1
2
3

-1
58 59
Exited: ExitFailure 5