Task: Program Execution
Input (English): E, f, 7, 9, 4, A
Output (English): [['E', 'f', '7', '9', '4'], ['E', 'f', '7', '9', 'A'], ['E', 'f', '7', '4', 'A'], ['E', 'f', '9', '4', 'A'], ['E', '7', '9', '4', 'A'], ['f', '7', '9', '4', 'A']]