Task: Program Execution
Input (English): 13, 16, ['3891', '6277', 'G', '1851', '1787', 'h', 'U', '5753', '1987', 'M', 'X', 'x', 'd', '1247', '6495', 'B', 'G', 't', '3557', '4247']
Output (English): B, 6495, 1247, d