Task: Program Execution
Input (English): c, o, f, i, D
Output (English): [['c', 'o', 'f', 'i'], ['c', 'o', 'f', 'D'], ['c', 'o', 'i', 'D'], ['c', 'f', 'i', 'D'], ['o', 'f', 'i', 'D']]