C1111133313331323223313331333133313231333132332131333133312111133131112121   >>    C111113331333132322331333133313331323133313233213133313331211113313111212   <<    C1111133313331323223313331333133313231333132332131333133312111133131112123   >>      C1111133313331323223313331333133313231333132332131333133312111133131112122   >>