Task: Program Execution
Input (English): 6, 20, ['7681', '2651', 'r', 'C', '3097', '5885', '2427', 'U', '4805', '9199', '6823', '7851', '7949', 'r', '7855', '3707', 's', 'S', '4443', 'H', '3343', 'y', 'J', 'p', 'K', '7345']
Output (English): H4443Ss37077855r79497851682391994805U24275885