Task: Program Execution
Input (English): 5, E, x, 0, S, 9, 7
Output (English): [['5', 'E', 'x', '0', 'S', '9'], ['5', 'E', 'x', '0', 'S', '7'], ['5', 'E', 'x', '0', '9', '7'], ['5', 'E', 'x', 'S', '9', '7'], ['5', 'E', '0', 'S', '9', '7'], ['5', 'x', '0', 'S', '9', '7'], ['E', 'x', '0', 'S', '9', '7']]