Task: Program Execution
Input (English): p 1199 b z 8777 g b j 4103 1775 a q v z i 7901 6675 c t 2731 9711 8321 9651 3603 9369 t 3299 5437 u 4985 7893
Output (English): a, b, c, g, i, j, p, q, t, u, v, z