Task: Program Execution
Input (English): H, Q, 8, O, U, i
Output (English): [['H', 'Q', '8', 'O', 'U'], ['H', 'Q', '8', 'O', 'i'], ['H', 'Q', '8', 'U', 'i'], ['H', 'Q', 'O', 'U', 'i'], ['H', '8', 'O', 'U', 'i'], ['Q', '8', 'O', 'U', 'i']]