a-a a-c a-z aaa aac aan aap aar aaz ac- aca acc acn acp acr acz an- ana anc ann anp anr anz ap- apa apc apn app apr ar- ara arc arn arp arr arz az- aza azn azp azz c-- caa cac can cap car caz cca ccc ccn ccp ccr ccz cn- cna cnc cnn cnp cnr cpa cpc cpn cpp cpr cpz cra crc crn crp crr crz cz- czc naa nac nan nap nar naz nca ncc ncn ncp ncr nna nnc nnn nnp nnz npa npc npn npp npr npz nra nrc nrn nrp nrr nrz nzp nzz p-p paa pac pan pap par paz pca pcc pcn pcp pcr pn- pna pnc pnn pnp pnr ppa ppc ppn ppp ppr ppz pra prc prn prp prr prz pzc pzp ra- raa rac ran rap rar raz rca rcc rcn rcp rcr rna rnc rnn rnp rnr rnz rpa rpc rpn rpp rpr rpz rra rrc rrn rrp rrr rza zaa zac zan zap zar zaz znc znn znp zpc zpp zpr zrp zzr zzz