Task: Program Execution
Input (English): 3, 20, ['x', 'o', 'b', 'L', '1895', 'Z', 'W', 'I', 'D', '4831', '8907', '5567', '6135', '241', 'M', 'i', '871', 'J', 'Q', '7255', 'L', '3165', '6471']
Output (English): 7255QJ871iM2416135556789074831DIWZ1895Lb