Task: Program Execution
Input (English): 1, 3, ['4665', '3691', 's', '2809', '4189', 'F', 'y', 'c', '687', '4251', '9911', '5743', '2861', 'F', 'x', 'X', 'z', 'f', 'D', 'z']
Output (English): s19635664