-er a-a a-b a-i a-t aaa aab aae aaf aai aan aao aap aar aat ab- aba abb abe abf abi abn abo abp abr abt aea aeb aee aef aei aen aeo aep aer aet af- afa afb afe aff afi afn afo afp afr aft ai- aia aib aie aif aii ain aio aip air ait an- ana anb ane anf ani ann ano anp anr ant aoa aob aoe aof aoi aon aoo aop aor aot ap- apa apb ape apf api apn apo app apr apt ar- ara arb are arf ari arn aro arp arr art at- ata atb ate atf ati atn ato atp atr att b-p baa bab bae baf bai ban bao bap bar bat bba bbb bbe bbf bbi bbn bbo bbp bbr bbt be- bea beb bee bef bei ben beo bep ber bet bfa bfb bfe bff bfi bfn bfo bfp bfr bft bi- bia bib bie bif bii bin bio bip bir bit bna bnb bne bnf bni bnn bno bnp bnr bnt boa bob boe bof boi bon boo bop bor bot bpa bpb bpe bpf bpi bpn bpo bpp bpr bpt bra brb bre brf bri brn bro brp brr brt bta btb bte btf bti btn bto btp btr btt eaa eab eae eaf eai ean eao eap ear eat eba ebb ebe ebf ebi ebn ebo ebp ebr ebt eea eeb eee eef een eeo eep eer eet ef- efa efb efe eff efi efo efp efr eft eia eib eie eif eii ein eio eip eir eit en- ena enb ene enf eni enn eno enp enr ent eo- eoa eob eoe eof eoi eon eoo eop eor eot ep- epa epb epe epf epi epn epo epp epr ept era erb ere erf eri ern ero erp err ert eta etb ete etf eti etn eto etp etr ett faa fab fae faf fai fan fao fap far fat fba fbb fbe fbf fbi fbn fbo fbp fbr fbt fea feb fee fef fei fen feo fep fer fet ffa ffe fff ffi ffn ffo ffp ffr fft fia fib fie fif fii fin fip fir fit fna fnb fne fnf fni fnn fnp fnr fnt foa fob foe fof foi fon foo fop for fot fpa fpb fpe fpi fpn fpo fpp fpr fpt fra frb fre frf fri frn fro frp frr frt fta ftb fte ftf fti ftn fto ftp ftr ftt i-f ia- iaa iab iae iaf iai ian iao iap iar iat iba ibb ibe ibf ibi ibn ibo ibp ibr ibt ie- iea iee ief iei ien iep ier iet ifa ifb ife iff ifi ifn ifo ifp ifr ift iia iib iie iif iii iin iio iip iir iit in- ina inb ine inf ini inn ino inp inr int io- ioa iob ioe iof ioi ion ioo iop ior iot ipa ipb ipe ipf ipi ipn ipo ipp ipr ipt ir- ira irb ire irf iri irn iro irp irr irt ita itb ite itf iti itn ito itp itt n-i naa nab nae naf nai nan nao nap nar nat nba nbb nbe nbf nbi nbn nbo nbp nbr nbt ne- nea neb nee nef nei nen neo nep ner net nfa nfb nfe nff nfi nfn nfo nfp nfr nft nia nib nie nif nii nin nio nip nir nit nna nnb nne nnf nni nnn nno nnp nnt no- noa nob noe nof noi non noo nop nor not npa npb npe npf npi npn npo npp npr npt nra nrb nre nrf nri nrn nro nrp nrr nrt nta ntb nte ntf nti ntn nto ntp ntr ntt o-i oaa oab oae oaf oai oan oao oap oar oat ob- oba obb obe obf obi obn obo obp obr obt oea oeb oee oef oei oen oeo oep oer oet of- ofa ofb ofe off ofi ofn ofo ofp ofr oft oia oib oie oif oii oin oio oip oir oit on- ona onb one onf oni onn ono onp onr ont oo- ooa oob oof ooi oon ooo oop oor oot op- opa opb ope opf opi opn opo opp opr opt or- ora orb ore orf ori orn oro orp orr ort ot- ota otb ote otf oti otn oto otp otr ott p-p paa pab pae paf pai pan pao pap par pat pba pbb pbe pbf pbi pbn pbo pbp pbr pbt pea peb pee pef pei pen peo pep per pet pfa pfb pfe pff pfi pfn pfo pfp pfr pft pia pib pie pif pii pin pio pip pir pit pn- pna pnb pne pnf pni pnn pno pnp pnr pnt poa pob poe pof poi pon poo pop por pot ppa ppb ppe ppf ppi ppn ppo ppp ppr ppt pra prb pre prf pri prn pro prp prr prt pt- pta ptb pte ptf pti ptn pto ptp ptr ptt ra- raa rab rae raf rai ran rao rap rar rat rba rbb rbe rbf rbi rbn rbo rbp rbr rbt re- rea reb ree ref rei ren reo rep rer ret rfa rfb rfe rff rfi rfn rfo rfp rfr rft ria rib rie rif rii rin rio rip rir rit rna rnb rni rnn rno rnp rnr rnt roa rob roe rof roi ron roo rop ror rot rpa rpb rpe rpf rpi rpn rpo rpp rpr rpt rra rrb rrf rri rrn rrp rrr rrt rta rtb rte rtf rti rtn rto rtp rtr rtt taa tab tae taf tai tan tao tap tar tat tba tbb tbe tbf tbi tbn tbo tbp tbr tbt te- tea teb tee tef tei ten teo tep ter tet tfa tfb tfe tff tfi tfn tfo tfp tfr tft tia tib tie tif tii tin tio tip tir tit tna tnb tne tnf tni tnn tno tnp tnr tnt to- toa tob toe tof toi ton too top tor tot tpa tpb