C22213331333133313112331323133313331333133313233211113313121121   >>    C2221333133313331311233132313331333133313331323321111331312112   <<    C22213331333133313112331323133313331333133313233211113313121123   >>      C22213331333133313112331323133313331333133313233211113313121122   >>