a-a a-b a-i aaa aab aah aai aan aao aar ab- aba abb abh abi abn abo abr aha ahb ahh ahi ahn aho ahr ai- aia aib aih aii ain aio air an- ana anb anh ani ann ano anr aoa aob aoh aoi aon aoo aor ar- ara arb arh ari arn aro arr baa bab bah bai ban bao bar bba bbb bbh bbi bbn bbo bbr bha bhb bhh bhi bho bhr bi- bia bib bih bii bin bio bir bna bnb bni bnn bno bnr boa bob boh boi bon boo bor bra brb brh bri brn bro brr h-i haa hab hah hai han hao har hba hbb hbh hbi hbn hbo hbr hha hhb hhh hhi hhn hho hhr hia hib hih hii hin hio hir hna hnb hnh hnn hno hoa hob hoh hoi hon hoo hor hr- hra hrb hrh hri hrn hro hrr ia- iaa iab iah iai ian iao iar iba ibb ibh ibi ibn ibo ibr iha ihb ihh ihi ihn iho ihr iia iib iih iii iin iio iir in- ina inb inh ini inn ino inr io- ioa iob ioh ioi ion ioo ior ir- ira irb iri irn iro irr n-i naa nab nah nai nan nao nar nba nbb nbi nbn nbo nbr nha nhb nhh nhi nhn nhr nia nib nih nii nin nio nir nna nnb nnh nni nnn nno no- noa nob noh noi non noo nor nra nrb nri nrn nro nrr o-i oaa oab oah oai oan oao oar ob- oba obb obh obi obn obo obr oha ohh ohi ohn oho ohr oia oib oii oin oio oir on- ona onb onh oni onn ono onr oo- ooa oob ooh ooi oon ooo oor or- ora orb orh ori orn oro orr ra- raa rab rah rai ran rao rar rba rbb rbh rbi rbn rbo rbr rh- rha rhb rhh rhi rhn rho rhr ria rib rih rii rin rio rir rna rnb rnh rni rnn rno rnr roa rob roh roi ron roo ror rra rrb rrh rri rrn rrr