Task: Program Execution
Input (English): 6, 19, ['6437', 'E', 'P', 'l', '3271', 'e', '8205', '5515', 'O', 'P', 'v', 'S', '171', '8383', '7397', 'm', 'x', '3423', 'B']
Output (English): B3243xm79373838171SvPO51555028e