Task: Program Execution
Input (English): Y, v, u, M, C
Output (English): [['Y', 'v', 'u', 'M'], ['Y', 'v', 'u', 'C'], ['Y', 'v', 'M', 'C'], ['Y', 'u', 'M', 'C'], ['v', 'u', 'M', 'C']]