Task: Program Execution
Input (English): H, 6, 3, 1, 9, s
Output (English): [['H', '6', '3', '1', '9'], ['H', '6', '3', '1', 's'], ['H', '6', '3', '9', 's'], ['H', '6', '1', '9', 's'], ['H', '3', '1', '9', 's'], ['6', '3', '1', '9', 's']]