Task: Program Execution
Input (English): 5, 20, ['509', '1165', 'J', 'f', '5169', 'd', 'j', '2379', 'K', '1667', '6551', '6333', 'm', '6085', 'U', '6251', '4943', 'a', '4741', 'j', '2087', '4079']
Output (English): j1474a34941526U5806m333615567661K9732jd9615