Task: Program Execution
Input (English): 6, p, 7, 9, 2, N, 1
Output (English): [['6', 'p', '7', '9', '2', 'N'], ['6', 'p', '7', '9', '2', '1'], ['6', 'p', '7', '9', 'N', '1'], ['6', 'p', '7', '2', 'N', '1'], ['6', 'p', '9', '2', 'N', '1'], ['6', '7', '9', '2', 'N', '1'], ['p', '7', '9', '2', 'N', '1']]