Task: Program Execution
Input (English): 2, 5, ['9207', 'W', '419', '3659', 'X', 'K', 'r', 'a', 'V', 'W', 'O', 's', 'X', '5267', '6233', '1343', '4109', 'X', '519', 'b']
Output (English): W4193659X