Task: Program Execution
Input (English): 9, p, M, u, 5, 4, 1
Output (English): [['9', 'p', 'M', 'u', '5', '4'], ['9', 'p', 'M', 'u', '5', '1'], ['9', 'p', 'M', 'u', '4', '1'], ['9', 'p', 'M', '5', '4', '1'], ['9', 'p', 'u', '5', '4', '1'], ['9', 'M', 'u', '5', '4', '1'], ['p', 'M', 'u', '5', '4', '1']]