Task: Program Execution
Input (English): k 3171 i 6951 j 7467 q z 4121 z 2853 3927 6259 t x h e 1803 9767 2275 h t a 9251 j o 5111 t 7725 f c q 7819 8889 6309 9981 7765 y
Output (English): a, c, e, f, h, i, j, k, o, q, t, x, y, z