C1111233131211111211113313331333133313331322322331323132233312121   >>    C111123313121111121111331333133313331333132232233132313223331212   <<    C1111233131211111211113313331333133313331322322331323132233312123   >>      C1111233131211111211113313331333133313331322322331323132233312122   >>