C11111211113313112113313331333131133133313331333132233133323121   >>    C1111121111331311211331333133313113313331333133313223313332312   <<    C11111211113313112113313331333131133133313331333132233133323123   >>      C11111211113313112113313331333131133133313331333132233133323122   >>