C1111133313331323223313331333133313331323133313331311331333223211113313231311   >>    C111113331333132322331333133313331333132313331333131133133322321111331323131   <<    C1111133313331323223313331333133313331323133313331311331333223211113313231313   >>      C1111133313331323223313331333133313331323133313331311331333223211113313231312   >>