Task: Program Execution
Input (English): m 2547 x y t 2135 9021 v 9589 u 503 v 2251 g s d 9541 x 8345 9807 4399 g z 5295 s i 1723 6247 w f
Output (English): d, f, g, i, m, s, t, u, v, w, x, y, z