Task: Program Execution
Input (English): 4, 18, ['3885', '3309', '8097', '6375', '9939', 'U', 'r', 'C', 'Y', '989', '217', '5091', 'c', 'F', 'm', '6779', '623', '5873', 'f', '909', 'c']
Output (English): 58736236779mFc5091217989YCrU99396375