a-a a-b a-i a-q aaa aab aai aan aao aaq aar ab- aba abb abi abn abo abq abr ai- aia aib aii ain aio aiq air an- ana anb ani ann ano anq anr aoa aob aoi aon aoo aor aqa aqi aqn aqo aqr ar- ara arb ari arn aro arq arr baa bab bai ban bao baq bar bba bbb bbi bbn bbo bbq bbr bi- bia bib bii bin bio bir bna bnb bni bnn bno bnr boa bob boi bon boo boq bor bra brb bri brn bro brq brr ia- iaa iab iai ian iao iaq iar iba ibb ibi ibn ibo ibr iia iib iii iin iio iir in- ina inb ini inn ino inq inr io- ioa iob ioi ion ioo ior iqa ir- ira irb iri irn iro irq irr n-i naa nab nai nan nao nar nba nbb nbi nbn nbo nbr nia nib nii nin nio niq nir nna nnb nni nnn nno no- noa nob noi non noo nor nra nrb nri nrn nro nrr o-i oaa oab oai oan oao oaq oar ob- oba obb obi obn obo obr oia oib oii oin oio oir on- ona onb oni onn ono onr oo- ooa oob ooi oon ooo oor oqb oqo or- ora orb ori orn oro orr qaa qan qar qba qbq qin qio qir qnb qni qoi qoo qor qqq qra qrb qri ra- raa rab rai ran rao raq rar rba rbb rbi rbn rbo rbr ria rib rii rin rio riq rir rna rnb rni rnn rno rnr roa rob roi ron roo ror rqn rra rrb rri rrn rrq rrr