C22212323232133313113313331333132313331323132321111312131222121   >>    C2221232323213331311331333133313231333132313232111131213122212   <<    C22212323232133313113313331333132313331323132321111312131222123   >>      C22212323232133313113313331333132313331323132321111312131222122   >>