Task: Program Execution
Input (English): 12, 20, ['v', 'K', '5907', 'B', '9811', 'B', 'h', '9955', 'W', 'v', '7605', '4133', 'f', '7101', 'K', '8269', 'b', 'L', 'D', '9151', '2731']
Output (English): 4133f7101K8269bLD9151