Task: Program Execution
Input (English): 7209 w u 5581 8901 z 179 b 359 u 7905 t 7115 4933 x d q 8863 z g c m l 7427 9373 3321 1331 2783 v x z 5937
Output (English): b, c, d, g, l, m, q, t, u, v, w, x, z