a-a a-b a-i aaa aab aaf aah aai aan aao aar ab- aba abb abf abh abi abn abo abr af- afa afb aff afh afi afn afo afr aha ahb ahf ahh ahi ahn aho ahr ai- aia aib aif aih aii ain aio air an- ana anb anf anh ani ann ano anr aoa aob aof aoh aoi aon aoo aor ar- ara arb arf arh ari arn aro arr baa bab baf bah bai ban bao bar bba bbb bbf bbh bbi bbn bbo bbr bfa bfb bff bfh bfi bfn bfo bfr bha bhb bhf bhh bhi bho bhr bi- bia bib bif bih bii bin bio bir bna bnb bnf bni bnn bno bnr boa bob bof boh boi bon boo bor bra brb brf brh bri brn bro brr faa fab faf fah fai fan fao far fba fbb fbf fbh fbi fbn fbo fbr ffa fff ffh ffi ffn ffo ffr fha fhb fhf fhh fhi fhn fho fhr fia fib fif fih fii fin fir fna fnb fnf fnh fni fnn fnr foa fob fof foh foi fon foo for fra frb frf frh fri frn fro frr h-i haa hab haf hah hai han hao har hba hbb hbf hbh hbi hbn hbo hbr hfa hfb hff hfh hfi hfn hfo hfr hha hhb hhf hhh hhi hhn hho hhr hia hib hif hih hii hin hio hir hna hnb hnf hnh hnn hno hoa hob hof hoh hoi hon hoo hor hr- hra hrb hrf hrh hri hrn hro hrr i-f ia- iaa iab iaf iah iai ian iao iar iba ibb ibf ibh ibi ibn ibo ibr ifa ifb iff ifi ifn ifo ifr iha ihb ihf ihh ihi ihn iho ihr iia iib iif iih iii iin iio iir in- ina inb inf inh ini inn ino inr io- ioa iob iof ioh ioi ion ioo ior ir- ira irb irf iri irn iro irr n-i naa nab naf nah nai nan nao nar nba nbb nbf nbi nbn nbo nbr nfa nfb nff nfi nfn nfo nfr nha nhb nhf nhh nhi nhn nhr nia nib nif nih nii nin nio nir nna nnb nnf nnh nni nnn nno no- noa nob nof noh noi non noo nor nra nrb nrf nri nrn nro nrr o-i oaa oab oaf oah oai oan oao oar ob- oba obb obf obh obi obn obo obr of- ofa ofb off ofi ofn ofo ofr oha ohf ohh ohi ohn oho ohr oia oib oif oii oin oio oir on- ona onb onf onh oni onn ono onr oo- ooa oob oof ooh ooi oon ooo oor or- ora orb orf orh ori orn oro orr ra- raa rab raf rah rai ran rao rar rba rbb rbf rbh rbi rbn rbo rbr rfa rfb rff rfh rfi rfn rfo rfr rh- rha rhb rhf rhh rhi rhn rho rhr ria rib rif rih rii rin rio rir rna rnb rnh rni rnn rno rnr roa rob rof roh roi ron roo ror rra rrb rrf rrh rri rrn rrr