C22212323232133313113313331333132313331323132322221212213323121   >>    C2221232323213331311331333133313231333132313232222121221332312   <<    C22212323232133313113313331333132313331323132322221212213323123   >>      C22212323232133313113313331333132313331323132322221212213323122   >>