Task: Program Execution
Input (English): 8711 2931 u j 8843 6971 2695 7605 q x u t f d r t 107 n g 6921 6299 9883 2017 x 9465 x 5545 q z p 5013 7451 t 8595 g n 8429 e 8449 v w
Output (English): d, e, f, g, j, n, p, q, r, t, u, v, w, x, z