C1111133313331323223313331333133313231333132332131333131211111121121211   >>    C111113331333132322331333133313331323133313233213133313121111112112121   <<    C1111133313331323223313331333133313231333132332131333131211111121121213   >>      C1111133313331323223313331333133313231333132332131333131211111121121212   >>