C11111211113313112113313331333133313231121131211111333133313232313223211131   >>    C1111121111331311211331333133313331323112113121111133313331323231322321113   <<    C11111211113313112113313331333133313231121131211111333133313232313223211133   >>      C11111211113313112113313331333133313231121131211111333133313232313223211132   >>