Two sentences: "Birds fly home in the clear lake and white sand beach" means "flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat
The three sentences "leaves fall like the spray of a waterfall" are "plain";
The words "and I think the long river is always rolling forward" are "flat and flat";
These five sentences "I came from three thousand miles away. Sad now and autumn "are both" flat and faint ";
Six words: "With my sorrow for a hundred years, I climbed this height alone. Flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat flat
The seven sentences of "misfortune is happiness, first frost is my temples" are "flat and flat";
The last sentence "heartache and fatigue are a thick layer of dust in my wine" is "flat and flat" because "turbidity" is entering the sound, so it is flat.