cccc ccgc ccgt ccoc ccrc ccrg ccrt cctc cctt cgcc cgcg cgro coco coct cogo coot cor- corc corg coro corr cort cotc coto cott crcc crcr croc croo cror crot crrt crtc ctor ctot ctrc gc-c gccc gcrg gctc gggg gocr gogo goog goor goot gorg goro gorr gort goto gott grcc groc grog groo gror grot grrr grtc gtco gtcr occc occt ocro ocrr oct- octo ogog ogro oocr oooo oort orco orgo oro- oror orot orro ortc orto oto- otog otoo otor otro otto rccc rcgc rcrg rctc rctg rgtr rocc roco rogg rogo roog roor root rorc roro rort rotc rotg roto rotr rott rrrr rtcc rtcg tccc tctc tgcc tgtc toco togo togr togt toor toot torc torg toro torr tort totc toto totr tott trcc troc trog troo trot trtc trtr tttt