/*
    This program accepts an ASCII character as input and prints all characters in decending order until 0 (null) is reached.
    It uses getchar() from the C standard library.
*/

.main                   // int main() {
CAL .getchar            //     int value = getchar();
._loop                  //     do {
    OUT 1 R1            //         putchar(value);
    DEC R1 R1           //         value--;
    BNZ ._loop R1       //     } while(value != 0);
                        //     exit();
HLT                     // }