C22212323232133313113313331333132313331323132322221212233211311   >>    C2221232323213331311331333133313231333132313232222121223321131   <<    C22212323232133313113313331333132313331323132322221212233211313   >>      C22212323232133313113313331333132313331323132322221212233211312   >>