Task: Program Execution
Input (English): y, 7, 4, 0, 4, K
Output (English): [['y', '7', '4', '0', '4'], ['y', '7', '4', '0', 'K'], ['y', '7', '4', '4', 'K'], ['y', '7', '0', '4', 'K'], ['y', '4', '0', '4', 'K'], ['7', '4', '0', '4', 'K']]