Task: Program Execution
Input (English): 9, 6, 1, X, e, c
Output (English): [['9', '6', '1', 'X', 'e'], ['9', '6', '1', 'X', 'c'], ['9', '6', '1', 'e', 'c'], ['9', '6', 'X', 'e', 'c'], ['9', '1', 'X', 'e', 'c'], ['6', '1', 'X', 'e', 'c']]