Task: Program Execution
Input (English): 1, 8, ['W', '3129', '4613', '1591', '6447', '8805', 'u', '5237', '5351', '5145', 'z', '5825', 'j', '4089', 'v', '1541', '8203', 'M', '9281']
Output (English): W, 5351, 8203