Task: Program Execution
Input (English): a 533 67 z z 9283 o a 7045 1521 m h q 4173 7497 319 5721 6097 i 9829 1801 7347 r z 239 4279 e k r v 6653 599 8597 d r
Output (English): a, d, e, h, i, k, m, o, q, r, v, z