Task: Program Execution
Input (English): l i 1321 4289 x 3251 i 9187 h 655 3077 1277 b z m v 5455 1051 v p 1831 1609 i c x 9495 w 645 n u 6175 g
Output (English): b, c, g, h, i, l, m, n, p, u, v, w, x, z