a-a a-b a-i aaa aab aag aah aai aan aao aar ab- aba abb abg abh abi abn abo abr ag- aga agb agg agh agi agn ago agr aha ahb ahg ahh ahi ahn aho ahr ai- aia aib aig aih aii ain aio air an- ana anb ang anh ani ann ano anr aoa aob aog aoh aoi aon aoo aor ar- ara arb arg arh ari arn aro arr baa bab bag bah bai ban bao bar bba bbb bbg bbh bbi bbn bbo bbr bga bgb bgg bgh bgi bgn bgo bgr bha bhb bhg bhh bhi bho bhr bi- bia bib big bih bii bin bio bir bna bnb bng bni bnn bno bnr boa bob bog boh boi bon boo bor bra brb brg brh bri brn bro brr gaa gab gag gah gai gan gao gar gba gbg gbh gbi gbn gbo gbr gga ggb ggg ggh ggi ggn ggo ggr gha ghb ghg ghh ghi ghn gho ghr gia gib gig gih gii gin gio gir gna gnb gni gnn gno gnr goa gob gog goh goi gon goo gor gra grb grg grh gri grn gro grr h-i haa hab hag hah hai han hao har hba hbb hbg hbh hbi hbn hbo hbr hga hgb hgg hgh hgi hgn hgo hgr hha hhb hhg hhh hhi hhn hho hhr hia hib hig hih hii hin hio hir hna hnb hng hnh hnn hno hoa hob hog hoh hoi hon hoo hor hr- hra hrb hrg hrh hri hrn hro hrr ia- iaa iab iag iah iai ian iao iar iba ibb ibg ibh ibi ibn ibo ibr iga igb igg igh igi ign igo igr iha ihb ihg ihh ihi ihn iho ihr iia iib iih iii iin iio iir in- ina inb ing inh ini inn ino inr io- ioa iob iog ioh ioi ion ioo ior ir- ira irb irg iri irn iro irr n-i naa nab nag nah nai nan nao nar nba nbb nbg nbi nbn nbo nbr nga ngb ngg ngh ngi ngn ngo nha nhb nhg nhh nhi nhn nhr nia nib nig nih nii nin nio nir nna nnb nng nnh nni nnn nno no- noa nob nog noh noi non noo nor nra nrb nrg nri nrn nro nrr o-i oaa oab oag oah oai oan oao oar ob- oba obb obg obh obi obn obo obr oga ogg ogh ogi ogn ogo oha ohg ohh ohi ohn oho ohr oia oib oii oin oio oir on- ona onb ong onh oni onn ono onr oo- ooa oob oog ooh ooi oon ooo oor or- ora orb org orh ori orn oro orr ra- raa rab rag rah rai ran rao rar rba rbb rbg rbh rbi rbn rbo rbr rga rgb rgg rgh rgi rgn rgo rgr rh- rha rhb rhg rhh rhi rhn rho rhr ria rib rig rih rii rin rio rir rna rnb rng rnh rni rnn rno rnr roa rob rog roh roi ron roo ror rra rrb rrg rrh rri rrn rrr