C11111333133313232233133313331333133313233213331323211232313131   >>    C1111133313331323223313331333133313331323321333132321123231313   <<    C11111333133313232233133313331333133313233213331323211232313133   >>      C11111333133313232233133313331333133313233213331323211232313132   >>