a-a a-c aaa aac aak aan aao aap aas ac- aca acc ack acn aco acp acs aka akc akk akn ako akp aks an- ana anc ank ann ano anp ans aoa aoc aok aon aoo aop aos ap- apa apc apk apn apo app aps as- asa asc ask asn aso asp ass c-- caa cac cak can cao cap cas cca ccc cck ccn cco ccp ccs cka ckc cko cks cn- cna cnc cnn cno cnp cns co- coa coc cok con coo cop cos cpa cpc cpk cpn cpo cpp cps csa csc csk csn cso csp css ka- kaa kac kak kan kao kap kas kca kcc kck kcn kcp kcs kkc kkk kkn kkp kks kn- kna knc knk knn kno knp koa koc kok kon koo kop kos kpa kpc kpk kpn kpo kpp kps ksa ksc ksk ksn kso ksp kss naa nac nak nan nao nap nas nca ncc nck ncn nco ncp ncs nka nkc nkk nkn nko nkp nks nna nnc nnk nnn nno nnp nns no- noa noc nok non noo nop nos npa npc npn npo npp nps nsa nsc nsk nsn nso nsp nss oaa oac oak oan oao oap oas oc- oca occ ock ocn oco ocp ocs oka okc okk oko okp oks on- ona onc onk onn ono onp ons oo- ooa ooc ook oon ooo oop oos op- opa opc opk opn opo opp ops os- osa osc osk osn oso osp oss p-p paa pac pak pan pao pap pas pca pcc pck pcn pco pcp pcs pka pkc pkn pko pkp pks pn- pna pnc pnk pnn pno pnp pns poa poc pok pon poo pop pos ppa ppc ppk ppn ppo ppp pps ps- psa psc psk psn pso psp pss saa sac sak san sao sap sas sca scc sck scn sco scp scs sk- ska skc skk sko skp sks sna snc snk snn sno snp sns soa soc sok son soo sop sos spa spc spk spn spo spp sps ss- ssa ssc ssk ssn sso ssp sss