Task: Program Execution
Input (English): 4, 10, ['7927', '8787', 'R', 'Q', 'm', '3999', 'x', '221', '7613', '3523', 'h', 'b', 'L', 'C', 'E', 'v', 'f', 'r', 'H', '9933', '3551', '7635']
Output (English): 35237613221x3999mQ