C11111333133313232233133313331333133313233213331323133313221211111112213311   >>    C1111133313331323223313331333133313331323321333132313331322121111111221331   <<    C11111333133313232233133313331333133313233213331323133313221211111112213313   >>      C11111333133313232233133313331333133313233213331323133313221211111112213312   >>