-er a-a a-i a-z aaa aae aaf aai aan aao aap aar aaz aea aee aef aei aen aeo aep aer aez af- afa afe aff afi afn afo afp afr afz ai- aia aie aif aii ain aio aip air aiz an- ana ane anf ani ann ano anp anr anz aoa aoe aof aoi aon aoo aop aor ap- apa ape apf api apn apo app apr ar- ara are arf ari arn aro arp arr arz az- aza aze azf azi azn azo azp azz eaa eae eaf eai ean eao eap ear eaz eea eee eef een eeo eep eer ef- efa efe eff efi efo efp efr eia eie eif eii ein eio eip eir en- ena ene enf eni enn eno enp enr enz eo- eoa eoe eof eoi eon eoo eop eor ep- epa epe epf epi epn epo epp epr epz era ere erf eri ern ero erp err erz eze ezf ezo ezr ezz faa fae faf fai fan fao fap far faz fea fee fef fei fen feo fep fer fez ffa ffe fff ffi ffn ffo ffp ffr ffz fia fie fif fii fin fip fir fiz fna fne fnf fni fnn fnp fnr fnz foa foe fof foi fon foo fop for foz fpa fpe fpi fpn fpo fpp fpr fra fre frf fri frn fro frp frr i-f ia- iaa iae iaf iai ian iao iap iar iaz ie- iea iee ief iei ien iep ier ifa ife iff ifi ifn ifo ifp ifr ifz iia iie iif iii iin iio iip iir in- ina ine inf ini inn ino inp inr io- ioa ioe iof ioi ion ioo iop ior ipa ipe ipf ipi ipn ipo ipp ipr ir- ira ire irf iri irn iro irp irr iza ize izi izo izz n-i naa nae naf nai nan nao nap nar naz ne- nea nee nef nei nen neo nep ner nez nfa nfe nff nfi nfn nfo nfp nfr nia nie nif nii nin nio nip nir niz nna nne nnf nni nnn nno nnp nnz no- noa noe nof noi non noo nop nor noz npa npe npf npi npn npo npp npr npz nra nre nrf nri nrn nro nrp nrr nrz nze nzf nzi nzo nzp nzz o-i oaa oae oaf oai oan oao oap oar oea oee oef oei oen oeo oep oer of- ofa ofe off ofi ofn ofo ofp ofr ofz oia oie oif oii oin oio oip oir oiz on- ona one onf oni onn ono onp onr oo- ooa oof ooi oon ooo oop oor op- opa ope opf opi opn opo opp opr or- ora ore orf ori orn oro orp orr orz oza oze ozo ozz p-p paa pae paf pai pan pao pap par paz pea pee pef pei pen peo pep per pez pfa pfe pff pfi pfn pfo pfp pfr pia pie pif pii pin pio pip pir piz pn- pna pne pnf pni pnn pno pnp pnr poa poe pof poi pon poo pop por poz ppa ppe ppf ppi ppn ppo ppp ppr ppz pra pre prf pri prn pro prp prr prz pzp ra- raa rae raf rai ran rao rap rar raz re- rea ree ref rei ren reo rep rer rez rfa rfe rff rfi rfn rfo rfp rfr rfz ria rie rif rii rin rio rip rir riz rna rni rnn rno rnp rnr rnz roa roe rof roi ron roo rop ror roz rpa rpe rpf rpi rpn rpo rpp rpr rpz rra rrf rri rrn rrp rrr rza rze rzo zaa zaf zai zan zao zap zar zaz zea zee zef zen zeo zep zer zez zfa zfn zfr zia zie zif zin zio zip zir ziz zne znn zno znp zo- zoa zoe zof zoi zon zoo zor zpe zpf zpi zpo zpp zpr zro zrp zzr zzz