Task: Program Execution
Input (English): z l 1743 m l k d m s k w 5979 657 n 1919 x h 393 9527 u 3387 k 9215 1909 7385 4371 9459 5377 w z 3803 h 9091 c
Output (English): c, d, h, k, l, m, n, s, u, w, x, z