C222133313331333131123313231333133313331333132112323133313223313232322221   >>    C22213331333133313112331323133313331333133313211232313331322331323232222   <<    C222133313331333131123313231333133313331333132112323133313223313232322223   >>      C222133313331333131123313231333133313331333132112323133313223313232322222   >>