Task: Program Execution
Input (English): 6635, z, 3543, 8407, 9263, 1665, 317, m, 8729, l, 1409, 6299, x, n, 1679, 6459, y, x, 6321, o, n, i, 5773
Output (English): i, l, m, n, o, x, y, z