C11111211113313112113313331333133313331322133313331323133312121   >>    C1111121111331311211331333133313331333132213331333132313331212   <<    C11111211113313112113313331333133313331322133313331323133312123   >>      C11111211113313112113313331333133313331322133313331323133312122   >>