Task: Program Execution
Input (English): 14, 20, ['y', 'Y', 'C', '6783', '7205', 'c', '8811', 'z', '7537', 'x', '8277', 'C', '9801', 'a', '2777', '6389', '5863', '1741', 'B', 'z', '131', '9057', '391', 'l', 'y', 'O', 'P', 'M', '6083']
Output (English): a2777638958631741Bz