C11111333133313232233133313331333131133132313311211111133121121   >>    C1111133313331323223313331333133313113313231331121111113312112   <<    C11111333133313232233133313331333131133132313311211111133121123   >>      C11111333133313232233133313331333131133132313311211111133121122   >>