C1111121111331311211331333133313331313331323223313331311331311221123231121   >>    C111112111133131121133133313331333131333132322331333131133131122112323112   <<    C1111121111331311211331333133313331313331323223313331311331311221123231123   >>      C1111121111331311211331333133313331313331323223313331311331311221123231122   >>