Task: Program Execution
Input (English): 4031 t o c x 3007 8329 6345 1267 1017 o x l 4129 d 1987 487 o g j v x 3983 f g 5759 k i o b n 683 j o t 4361 u
Output (English): b, c, d, f, g, i, j, k, l, n, o, t, u, v, x