C1111233131211111211113313331333133313232232133313112113313221121   >>    C111123313121111121111331333133313331323223213331311211331322112   <<    C1111233131211111211113313331333133313232232133313112113313221123   >>      C1111233131211111211113313331333133313232232133313112113313221122   >>