Task: Program Execution
Input (English): 3, 18, ['W', 'U', 'Z', '7389', '8715', '2391', '4159', 'Z', '3197', '737', 'f', 'V', '2285', 'u', 'v', '6499', 'T', 'G', 'v', 'K']
Output (English): Z7389871523914159Z3197737fV2285uv6499TG