Task: Program Execution
Input (English): 19, 20, ['239', 'z', 'Z', 'a', '5631', 'j', 'M', 'z', '8643', '711', 'g', '1857', '3833', '4751', '1441', '789', '3883', '5117', 'N', '6671', 'P', '1523']
Output (English): N, 6671