cccc ccci ccee ccic ccii ccir ccrc ccre ccri cec- cece ceci ceec cer- cerc cere ceri cicc cici cicr ciee cier ciii circ cire ciri cirr crcc crce crcr cre- crec cree crei cric crie eccc ecce ecci ecrc ecri ecrr eeee eerc eiec eiei eier eire ercc erce erec erei erer eric erie errc erre iccc icci iccr icec icee icer icrc icre icrr iecc ieie iere ieri iiie iiii iirc ircc iree irer iri- iric irie irrc irre irri rccc rcic recc rece reci recr reii reir rere reri ricc rice rier rire riri rrrr