C1111133313331323223313331333133313113313331133132233132212112111   >>    C111113331333132322331333133313331311331333113313223313221211211   <<    C1111133313331323223313331333133313113313331133132233132212112113   >>      C1111133313331323223313331333133313113313331133132233132212112112   >>