Task: Program Execution
Input (English): Y, C, 7, 7, 5, I, b
Output (English): [['Y', 'C', '7', '7', '5', 'I'], ['Y', 'C', '7', '7', '5', 'b'], ['Y', 'C', '7', '7', 'I', 'b'], ['Y', 'C', '7', '5', 'I', 'b'], ['Y', 'C', '7', '5', 'I', 'b'], ['Y', '7', '7', '5', 'I', 'b'], ['C', '7', '7', '5', 'I', 'b']]