Task: Program Execution
Input (English): ['i', 4251, 8671, 'y', 'U', 'n', 'P', 'Y', '2729', 'j', 3775, 'M', 5689], ['y', 6173, 'U', 'n', 'P', 'Y', '2729', 'a', 633]
Output (English): U, n, P, Y, 2729