a-a a-i aaa aaf aai aan aao aap aar aas af- afa aff afi afn afo afp afr afs ai- aia aif aii ain aio aip air ais an- ana anf ani ann ano anp anr ans aoa aof aoi aon aoo aop aor aos ap- apa apf api apn apo app apr aps ar- ara arf ari arn aro arp arr ars as- asa asf asi asn aso asp asr ass faa faf fai fan fao fap far fas ffa fff ffi ffn ffo ffp ffr ffs fia fif fii fin fip fir fis fna fnf fni fnn fnp fnr fns foa fof foi fon foo fop for fos fpa fpi fpn fpo fpp fpr fps fra frf fri frn fro frp frr frs fsa fsf fsi fsn fso fsp fsr fss i-f ia- iaa iaf iai ian iao iap iar ias ifa iff ifi ifn ifo ifp ifr ifs iia iif iii iin iio iip iir iis in- ina inf ini inn ino inp inr ins io- ioa iof ioi ion ioo iop ior ios ipa ipf ipi ipn ipo ipp ipr ips ir- ira irf iri irn iro irp irr irs is- isa isf isi isn iso isp isr iss n-i naa naf nai nan nao nap nar nas nfa nff nfi nfn nfo nfp nfr nfs nia nif nii nin nio nip nir nis nna nnf nni nnn nno nnp nns no- noa nof noi non noo nop nor nos npa npf npi npn npo npp npr nps nra nrf nri nrn nro nrp nrr nrs nsa nsf nsi nsn nso nsp nsr nss o-i oaa oaf oai oan oao oap oar oas of- ofa off ofi ofn ofo ofp ofr ofs oia oif oii oin oio oip oir ois on- ona onf oni onn ono onp onr ons oo- ooa oof ooi oon ooo oop oor oos op- opa opf opi opn opo opp opr ops or- ora orf ori orn oro orp orr ors os- osa osf osi osn oso osp osr oss p-p paa paf pai pan pao pap par pas pfa pff pfi pfn pfo pfp pfr pfs pia pif pii pin pio pip pir pis pn- pna pnf pni pnn pno pnp pnr pns poa pof poi pon poo pop por pos ppa ppf ppi ppn ppo ppp ppr pps pra prf pri prn pro prp prr prs ps- psa psf psi psn pso psp psr pss ra- raa raf rai ran rao rap rar ras rfa rff rfi rfn rfo rfp rfr rfs ria rif rii rin rio rip rir ris rna rni rnn rno rnp rnr rns roa rof roi ron roo rop ror ros rpa rpf rpi rpn rpo rpp rpr rps rra rrf rri rrn rrp rrr rrs rsa rsf rsi rsn rso rsp rsr rss saa saf sai san sao sap sar sas sfa sff sfi sfn sfo sfp sfr sfs sia sif sii sin sio sip sir sis sna snf sni snn sno snp snr sns soa sof soi son soo sop sor sos spa spf spi spn spo spp spr sps sr- sra srf sri srn sro srp srr srs ss- ssa ssf ssi ssn sso ssp ssr sss