C11111211113313112113313331333133313133313232233133313232221131   >>    C1111121111331311211331333133313331313331323223313331323222113   <<    C11111211113313112113313331333133313133313232233133313232221133   >>      C11111211113313112113313331333133313133313232233133313232221132   >>