-exp: { printf ("0\n"); }
- '1' { printf ("1\n"); }
- '2' { printf ("2\n"); }
- '3' { printf ("3\n"); }
- '4' { printf ("4\n"); }
- '5' { printf ("5\n"); }
- '6' { printf ("6\n"); }
- '7' { printf ("7\n"); }
- '8' { printf ("8\n"); }
- '9' { printf ("9\n"); }