C1111233131211111211113313331333133313331322322331333133321233133323311   >>    C111123313121111121111331333133313331333132232233133313332123313332331   <<    C1111233131211111211113313331333133313331322322331333133321233133323313   >>      C1111233131211111211113313331333133313331322322331333133321233133323312   >>