C11111333133313232233133313331333133313231312111133131133121221   >>    C1111133313331323223313331333133313331323131211113313113312122   <<    C11111333133313232233133313331333133313231312111133131133121223   >>      C11111333133313232233133313331333133313231312111133131133121222   >>