Task: Program Execution
Input (English): u o 9987 v z 2461 q 3159 n k r 9961 w f 4419 3261 7381 j a 2975 o i t w 3899 3519 y 3183 e
Output (English): a, e, f, i, j, k, n, o, q, r, t, u, v, w, y, z