Task: Program Execution
Input (English): E, 2187, 3605, 3621, 1219, 921, 9813, U, 7347, 9955, 7811, 4083
Output (English): E, U, 2187, 3605, 3621, 1219, 921, 9813, 7347, 9955, 7811, 4083