C11111333133313232233133313331333131133132233133313223313221221   >>    C1111133313331323223313331333133313113313223313331322331322122   <<    C11111333133313232233133313331333131133132233133313223313221223   >>      C11111333133313232233133313331333131133132233133313223313221222   >>