a-a aaa aaf aag aah aan aao aar af- afa aff afg afh afn afo afr ag- aga agf agg agh agn ago agr aha ahf ahg ahh ahn aho ahr an- ana anf ang anh ann ano anr aoa aof aog aoh aon aoo aor ar- ara arf arg arh arn aro arr faa faf fag fah fan fao far ffa fff ffg ffh ffn ffo ffr fga fgf fgg fgh fgn fgr fha fhf fhg fhh fhn fho fhr fna fnf fng fnh fnn fnr foa fof fog foh fon foo for fra frf frg frh frn fro frr gaa gaf gag gah gan gao gar gfa gff gfh gfo gfr gga ggg ggh ggn ggo ggr gha ghg ghh ghn gho ghr gna gnf gnn gno gnr goa gof gog goh gon goo gor gra grf grg grh grn gro grr haa haf hag hah han hao har hfa hff hfg hfh hfn hfo hfr hga hgf hgg hgh hgn hgo hgr hha hhf hhg hhh hhn hho hhr hna hnf hng hnh hnn hno hoa hof hog hoh hon hoo hor hr- hra hrf hrg hrh hrn hro hrr naa naf nag nah nan nao nar nfa nff nfn nfo nfr nga ngf ngg ngh ngn ngo nha nhf nhg nhh nhn nhr nna nnf nng nnh nnn nno no- noa nof nog noh non noo nor nra nrf nrg nrn nro nrr oaa oaf oag oah oan oao oar of- ofa off ofg ofn ofo ofr oga ogf ogg ogh ogn ogo oha ohf ohg ohh ohn oho ohr on- ona onf ong onh onn ono onr oo- ooa oof oog ooh oon ooo oor or- ora orf org orh orn oro orr ra- raa raf rag rah ran rao rar rfa rff rfg rfh rfn rfo rfr rga rgf rgg rgh rgn rgo rgr rh- rha rhf rhg rhh rhn rho rhr rna rng rnh rnn rno rnr roa rof rog roh ron roo ror rra rrf rrg rrh rrn rrr