C1111133313331323223313331333133313331333133313331333231123212121   >>    C111113331333132322331333133313331333133313331333133323112321212   <<    C1111133313331323223313331333133313331333133313331333231123212123   >>      C1111133313331323223313331333133313331333133313331333231123212122   >>