a-a a-c a-z aaa aac aae aag aan aao aaz ac- aca acc ace acg acn aco acz aea aec aee aeg aen aeo aez ag- aga agc age agg agn ago agz an- ana anc ane ang ann ano anz aoa aoc aoe aog aon aoo az- aza aze azg azn azo azz c-- caa cac cae cag can cao caz cca ccc cce ccg ccn cco ccz ce- cea cec cee ceg cen ceo cez cga cgc cge cgg cgn cgo cn- cna cnc cne cng cnn cno co- coa coc coe cog con coo coz cz- czc cze czo eaa eac eae eag ean eao eaz ec- eca ecc ece ecg ecn eco eea eec eee eeg een eeo ega egc ege egg egn ego en- ena enc ene eng enn eno enz eo- eoa eoc eoe eog eon eoo eze ezo ezz gaa gac gae gag gan gao gaz gca gcc gce gcg gcn gco ge- gea gec gee geg gen geo gez gga ggc ggg ggn ggo ggz gna gnc gne gnn gno goa goc goe gog gon goo goz gza gzo naa nac nae nag nan nao naz nca ncc nce ncg ncn nco ne- nea nec nee neg nen neo nez nga ngc nge ngg ngn ngo nna nnc nne nng nnn nno nnz no- noa noc noe nog non noo noz nze nzg nzo nzz oaa oac oae oag oan oao oc- oca occ ocg ocn oco ocz oea oec oee oeg oen oeo oga ogc oge ogg ogn ogo on- ona onc one ong onn ono oo- ooa ooc oog oon ooo oza oze ozo ozz z-g zaa zac zag zan zao zaz zce zco zea zec zee zen zeo zez zgg znc zne znn zno zo- zoa zoc zoe zog zon zoo zzz