Task: Program Execution
Input (English): 4945, 5809, 1739, 1519, 9691, 6191, 7991, b, 4645, 1911, 8969, U, b, P, 9757, 7437, X, R, 7837, W
Output (English): b, U, b, P, X, R, W, 4945, 5809, 1739, 1519, 9691, 6191, 7991, 4645, 1911, 8969, 9757, 7437, 7837