C11111211113313112113313331333133313331333132313331333133313232233133323111   >>    C1111121111331311211331333133313331333133313231333133313331323223313332311   <<    C11111211113313112113313331333133313331333132313331333133313232233133323113   >>      C11111211113313112113313331333133313331333132313331333133313232233133323112   >>