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There were two men, one next to the other. One had the experience and calm face. The other had no experience and a calm face. They were two birds, one had just landed and the other was about to fly. They were two identical columns, but one held 500 tons and the other held 5. They were two days, one had already passed and another was yet to come. They were two lovers, one was happy forever and the other had lost track of time. There were two lines, one beginning from top to bottom and the other from bottom to top. Who sets the tone for the song eye?