Task: Program Execution
Input (English): H, a, S, 6, b, 6, M
Output (English): [['H', 'a', 'S', '6', 'b', '6'], ['H', 'a', 'S', '6', 'b', 'M'], ['H', 'a', 'S', '6', '6', 'M'], ['H', 'a', 'S', 'b', '6', 'M'], ['H', 'a', '6', 'b', '6', 'M'], ['H', 'S', '6', 'b', '6', 'M'], ['a', 'S', '6', 'b', '6', 'M']]