Task: Program Execution
Input (English): 4991, F, o, U, 453, h, 3631, A, 6921, I, B, 2921, A, K, 6175, x, Y, x
Output (English): F, o, U, h, A, I, B, A, K, x, Y, x, 4991, 453, 3631, 6921, 2921, 6175