Task: Program Execution
Input (English): b 5557 i z 1057 d 5601 x 5297 e 5397 w 8439 8941 1911 c 9421 h c 2419 a v k q x 2941 j
Output (English): a, b, c, d, e, h, i, j, k, q, v, w, x, z