C1111133313331323223313331333133313231333132332131333133313121111113232321   >>    C111113331333132322331333133313331323133313233213133313331312111111323232   <<    C1111133313331323223313331333133313231333132332131333133313121111113232323   >>      C1111133313331323223313331333133313231333132332131333133313121111113232322   >>