a-a a-b a-i a-t aaa aab aai aak aan aar aat ab- aba abb abi abk abn abr abt ai- aia aib aii aik ain air ait aka akb aki akk akn akr an- ana anb ani ank ann anr ant ar- ara arb ari ark arn arr art at- ata atb ati atn atr att baa bab bai bak ban bar bat bba bbb bbi bbk bbn bbr bbt bi- bia bib bii bik bin bir bit bka bkb bkk bkn bkr bkt bna bnb bni bnk bnn bnr bnt bra brb bri brk brn brr brt bta btb bti btk btn btr btt ia- iaa iab iai ian iar iat iba ibb ibi ibk ibn ibr ibt iia iib iii iin iir iit ika ikb iki ikk ikr ikt in- ina inb ini ink inn inr int ir- ira irb iri irk irn irr irt ita itb iti itk itn itt k-t ka- kaa kab kai kak kan kar kat kba kbb kbi kbk kbn kbr kia kib kii kik kin kir kit kkb kki kkk kkn kkr kkt kn- kna kni knk knn knr knt kra kri krk krn krr krt kta ktb ktk ktn ktr ktt n-i naa nab nai nak nan nar nat nba nbb nbi nbk nbn nbr nbt nia nib nii nik nin nir nit nka nki nkk nkn nkr nkt nna nnb nni nnk nnn nnt nra nrb nri nrk nrn nrr nrt nta ntb nti ntk ntn ntr ntt ra- raa rab rai rak ran rar rat rba rbb rbi rbk rbn rbr rbt ria rib rii rik rin rir rit rkb rkk rkt rna rnb rni rnn rnr rnt rra rrb rri rrk rrn rrr rrt rta rtb rti rtk rtn rtr rtt taa tab tai tak tan tar tat tba tbb tbi tbk tbn tbr tbt tia tib tii tik tin tir tit tka tkb tkk tkr tkt tna tnb tni tnk tnn tnr tnt tra trb tri trk trn trr trt tta ttb tti ttk ttn ttr ttt