Task: Program Execution
Input (English): 1, 6, ['7527', '6345', '2383', 'R', '5307', 'U', '3833', '519', 'M', '3621', '8325', 't', 'G', '4009', 'C', '6997', 'J', 'M']
Output (English): 7527, 3833, G