Task: Program Execution
Input (English): 3635 r z d 3773 9231 4231 4011 b 2947 c f k d 3673 8377 7971 9659 j a 565 4659 2185 5423 q i w 2739 r 833 5235 p b 6723 2139 u 1773 693 h 9065 6533 k 5191 5753
Output (English): a, b, c, d, f, h, i, j, k, p, q, r, u, w, z