a-a a-i aaa aaf aai aak aan aao aap aar af- afa aff afi afk afn afo afp afr ai- aia aif aii aik ain aio aip air aka aki akk akn ako akp akr an- ana anf ani ank ann ano anp anr aoa aof aoi aok aon aoo aop aor ap- apa apf api apk apn apo app apr ar- ara arf ari ark arn aro arp arr faa faf fai fak fan fao fap far ffa fff ffi ffk ffn ffo ffp ffr fia fif fii fik fin fip fir fka fkf fki fkk fkp fna fnf fni fnk fnn fnp fnr foa fof foi fok fon foo fop for fpa fpi fpk fpn fpo fpp fpr fra frf fri frk frn fro frp frr i-f ia- iaa iaf iai ian iao iap iar ifa iff ifi ifn ifo ifp ifr iia iif iii iin iio iip iir ika ikf iki ikk iko ikr in- ina inf ini ink inn ino inp inr io- ioa iof ioi ion ioo iop ior ipa ipf ipi ipn ipo ipp ipr ir- ira irf iri irk irn iro irp irr ka- kaa kaf kai kak kan kao kap kar kfa kff kfi kfo kia kif kii kik kin kio kip kir kki kkk kkn kkp kkr kn- kna knf kni knk knn kno knp knr koa kof koi kok kon koo kop kor kpa kpf kpi kpk kpn kpo kpp kpr kra krf kri krk krn kro krp krr n-i naa naf nai nak nan nao nap nar nfa nff nfi nfk nfn nfo nfp nfr nia nif nii nik nin nio nip nir nka nkf nki nkk nkn nko nkp nkr nna nnf nni nnk nnn nno nnp no- noa nof noi nok non noo nop nor npa npf npi npn npo npp npr nra nrf nri nrk nrn nro nrp nrr o-i oaa oaf oai oak oan oao oap oar of- ofa off ofi ofn ofo ofp ofr oia oif oii oik oin oio oip oir oka oki okk oko okp okr on- ona onf oni onk onn ono onp onr oo- ooa oof ooi ook oon ooo oop oor op- opa opf opi opk opn opo opp opr or- ora orf ori ork orn oro orp orr p-p paa paf pai pak pan pao pap par pfa pff pfi pfk pfn pfo pfp pfr pia pif pii pik pin pio pip pir pka pkf pki pkn pko pkp pkr pn- pna pnf pni pnk pnn pno pnp pnr poa pof poi pok pon poo pop por ppa ppf ppi ppk ppn ppo ppp ppr pra prf pri prk prn pro prp prr ra- raa raf rai rak ran rao rap rar rfa rff rfi rfk rfn rfo rfp rfr ria rif rii rik rin rio rip rir rkf rkk rko rkp rna rni rnn rno rnp rnr roa rof roi rok ron roo rop ror rpa rpf rpi rpk rpn rpo rpp rpr rra rrf rri rrk rrn rrp rrr