Task: Program Execution
Input (English): 3987 z b S 4703 b e 5873 k G 7943 2837 5267 x 2191 1263 7607 I 6221 4335 c 3967 4979 U f 8597
Output (English): z, b, S, b, e, k, G, x, I, c, U, f, 3987, 4703, 5873, 7943, 2837, 5267, 2191, 1263, 7607, 6221, 4335, 3967, 4979, 8597