Task: Program Execution
Input (English): 71 d 4067 t k w 3301 7609 1901 d 1259 n z f c 4655 2455 3615 3503 1027 r 2457 q 5073 1801 u b u 9007 7805 967 m o 9755 z 7629
Output (English): b, c, d, f, k, m, n, o, q, r, t, u, w, z