Task: Program Execution
Input (English): 7665 r 9269 j k j k o l 1277 u 5837 5827 3089 857 w y 1825 883 1803 v 3311 8207 7603 i z v z f k a
Output (English): a, f, i, j, k, l, o, r, u, v, w, y, z