C11111333133313232233133313331333133313223313331323132233133313211   >>    C1111133313331323223313331333133313331322331333132313223313331321   <<    C11111333133313232233133313331333133313223313331323132233133313213   >>      C11111333133313232233133313331333133313223313331323132233133313212   >>