Types: L: int, H: int, TRY: str, HIT: int, BLOW: int  
Ranges: 4 ≤ L ≤ 10, 1 ≤ H ≤ 20, TRY: str (length L, characters in '0'-'9', unique digits), 0 ≤ HIT ≤ L, 0 ≤ BLOW ≤ L  
Addtl Info: Input ends with "0 0".