C11111333133313232233133313331333131133132313311211112113121121   >>    C1111133313331323223313331333133313113313231331121111211312112   <<    C11111333133313232233133313331333131133132313311211112113121123   >>      C11111333133313232233133313331333131133132313311211112113121122   >>