Task: Program Execution
Input (English): 4, 21, ['W', 'L', 'I', '3027', 't', '4221', 'Y', '7161', 'D', 'p', '3167', '3515', 'P', 'G', 'o', '6705', '6007', 'U', 'C', 'r', 'G', 'f', '8729', 'l', '505', '2269', 'D']
Output (English): GrCU70065076oGP51537613pD1617Y1224t7203