Task: Program Execution
Input (English): w f n j q e 4879 9419 y 5259 5581 c 2705 l 31 6011 4003 t q 9091 6757 o 5409 4171 d v 8445 775 s 6529 8895 3447 s z 9745 4113 k r 2229 s 2995 1393 i l
Output (English): c, d, e, f, i, j, k, l, n, o, q, r, s, t, v, w, y, z