C11111211113313112113313331333133313331333132233131133133313232213121   >>    C1111121111331311211331333133313331333133313223313113313331323221312   <<    C11111211113313112113313331333133313331333132233131133133313232213123   >>      C11111211113313112113313331333133313331333132233131133133313232213122   >>