Task: Program Execution
Input (English): I, 3, 2, 1, 4, f, 5
Output (English): [['I', '3', '2', '1', '4', 'f'], ['I', '3', '2', '1', '4', '5'], ['I', '3', '2', '1', 'f', '5'], ['I', '3', '2', '4', 'f', '5'], ['I', '3', '1', '4', 'f', '5'], ['I', '2', '1', '4', 'f', '5'], ['3', '2', '1', '4', 'f', '5']]