-ic a-a a-c a-i aaa aac aai aak aan aao aap aar ac- aca acc aci ack acn aco acp acr ai- aia aic aii aik ain aio aip air aka akc aki akk akn ako akp akr an- ana anc ani ank ann ano anp anr aoa aoc aoi aok aon aoo aop aor ap- apa apc api apk apn apo app apr ar- ara arc ari ark arn aro arp arr c-- caa cac cai cak can cao cap car cca ccc cci cck ccn cco ccp ccr ci- cia cic cii cik cin cio cip cir cka ckc cki cko cn- cna cnc cni cnn cno cnp cnr co- coa coc coi cok con coo cop cor cpa cpc cpi cpk cpn cpo cpp cpr cra crc cri crk crn cro crp crr ia- iaa iac iai ian iao iap iar ica icc ici ick icn ico icp icr iia iic iii iin iio iip iir ika ikc iki ikk iko ikr in- ina inc ini ink inn ino inp inr io- ioa ioc ioi ion ioo iop ior ipa ipc ipi ipn ipo ipp ipr ir- ira irc iri irk irn iro irp irr ka- kaa kac kai kak kan kao kap kar kca kcc kci kck kcn kcp kcr kia kic kii kik kin kio kip kir kkc kki kkk kkn kkp kkr kn- kna knc kni knk knn kno knp knr koa koc koi kok kon koo kop kor kpa kpc kpi kpk kpn kpo kpp kpr kra krc kri krk krn kro krp krr n-i naa nac nai nak nan nao nap nar nca ncc nci nck ncn nco ncp ncr nia nic nii nik nin nio nip nir nka nkc nki nkk nkn nko nkp nkr nna nnc nni nnk nnn nno nnp no- noa noc noi nok non noo nop nor npa npc npi npn npo npp npr nra nrc nri nrk nrn nro nrp nrr o-i oaa oac oai oak oan oao oap oar oc- oca occ oci ock ocn oco ocp ocr oia oic oii oik oin oio oip oir oka okc oki okk oko okp okr on- ona onc oni onk onn ono onp onr oo- ooa ooc ooi ook oon ooo oop oor op- opa opc opi opk opn opo opp opr or- ora orc ori ork orn oro orp orr p-p paa pac pai pak pan pao pap par pca pcc pci pck pcn pco pcp pcr pia pic pii pik pin pio pip pir pka pkc pki pkn pko pkp pkr pn- pna pnc pni pnk pnn pno pnp pnr poa poc poi pok pon poo pop por ppa ppc ppi ppk ppn ppo ppp ppr pra prc pri prk prn pro prp prr ra- raa rac rai rak ran rao rap rar rca rcc rci rcn rco rcp rcr ria ric rii rik rin rio rip rir rkc rkk rko rkp rna rnc rni rnn rno rnp rnr roa roc roi rok ron roo rop ror rpa rpc rpi rpk rpn rpo rpp rpr rra rrc rri rrk rrn rrp rrr