-er a-a a-b a-i aaa aab aae aaf aag aai aan aap aar ab- aba abb abe abf abg abi abn abp abr aea aeb aee aef aeg aei aen aep aer af- afa afb afe aff afg afi afn afp afr ag- aga agb age agf agg agi agn agp agr ai- aia aib aie aif aig aii ain aip air an- ana anb ane anf ang ani ann anp anr ap- apa apb ape apf apg api apn app apr ar- ara arb are arf arg ari arn arp arr b-p baa bab bae baf bag bai ban bap bar bba bbb bbe bbf bbg bbi bbn bbp bbr be- bea beb bee bef beg bei ben bep ber bfa bfb bfe bff bfg bfi bfn bfp bfr bga bgb bge bgf bgg bgi bgn bgp bgr bi- bia bib bie bif big bii bin bip bir bna bnb bne bnf bng bni bnn bnp bnr bpa bpb bpe bpf bpg bpi bpn bpp bpr bra brb bre brf brg bri brn brp brr eaa eab eae eaf eag eai ean eap ear eba ebb ebe ebf ebg ebi ebn ebp ebr eea eeb eee eef eeg een eep eer ef- efa efb efe eff efg efi efp efr ega egb ege egf egg egi egn egp egr eia eib eie eif eig eii ein eip eir en- ena enb ene enf eng eni enn enp enr ep- epa epb epe epf epg epi epn epp epr era erb ere erf erg eri ern erp err faa fab fae faf fag fai fan fap far fba fbb fbe fbf fbg fbi fbn fbp fbr fea feb fee fef feg fei fen fep fer ffa ffe fff ffg ffi ffn ffp ffr fga fgb fge fgf fgg fgi fgn fgp fgr fia fib fie fif fig fii fin fip fir fna fnb fne fnf fng fni fnn fnp fnr fpa fpb fpe fpg fpi fpn fpp fpr fra frb fre frf frg fri frn frp frr g-p gaa gab gae gaf gag gai gan gap gar gba gbe gbf gbg gbi gbn gbp gbr ge- gea geb gee gef geg gei gen gep ger gfa gfb gfe gff gfi gfp gfr gga ggb ggg ggi ggn ggp ggr gia gib gie gif gig gii gin gip gir gna gnb gne gnf gni gnn gnp gnr gpa gpb gpe gpf gpg gpi gpn gpp gpr gra grb gre grf grg gri grn grp grr i-f ia- iaa iab iae iaf iag iai ian iap iar iba ibb ibe ibf ibg ibi ibn ibp ibr ie- iea iee ief ieg iei ien iep ier ifa ifb ife iff ifg ifi ifn ifp ifr iga igb ige igf igg igi ign igp igr iia iib iie iif iii iin iip iir in- ina inb ine inf ing ini inn inp inr ipa ipb ipe ipf ipg ipi ipn ipp ipr ir- ira irb ire irf irg iri irn irp irr n-i naa nab nae naf nag nai nan nap nar nba nbb nbe nbf nbg nbi nbn nbp nbr ne- nea neb nee nef neg nei nen nep ner nfa nfb nfe nff nfi nfn nfp nfr nga ngb nge ngf ngg ngi ngn ngp nia nib nie nif nig nii nin nip nir nna nnb nne nnf nng nni nnn nnp npa npb npe npf npg npi npn npp npr nra nrb nre nrf nrg nri nrn nrp nrr p-p paa pab pae paf pag pai pan pap par pba pbb pbe pbf pbg pbi pbn pbp pbr pea peb pee pef peg pei pen pep per pfa pfb pfe pff pfg pfi pfn pfp pfr pga pgb pge pgf pgg pgi pgn pgp pgr pia pib pie pif pig pii pin pip pir pn- pna pnb pne pnf png pni pnn pnp pnr ppa ppb ppe ppf ppg ppi ppn ppp ppr pra prb pre prf prg pri prn prp prr ra- raa rab rae raf rag rai ran rap rar rba rbb rbe rbf rbg rbi rbn rbp rbr re- rea reb ree ref reg rei ren rep rer rfa rfb rfe rff rfg rfi rfn rfp rfr rga rgb rge rgf rgg rgi rgn rgp rgr ria rib rie rif rig rii rin rip rir rna rnb rng rni rnn rnp rnr rpa rpb rpe rpf rpg rpi rpn rpp rpr rra rrb rrf rrg rri rrn rrp rrr