a-a a-b a-i a-t aaa aab aae aai aak aan aao aat ab- aba abb abe abi abk abn abo abt aea aeb aee aei aek aen aeo aet ai- aia aib aie aii aik ain aio ait aka akb ake aki akk akn ako an- ana anb ane ani ank ann ano ant aoa aob aoe aoi aok aon aoo aot at- ata atb ate ati atn ato att baa bab bae bai bak ban bao bat bba bbb bbe bbi bbk bbn bbo bbt be- bea beb bee bei bek ben beo bet bi- bia bib bie bii bik bin bio bit bka bkb bke bkk bkn bko bkt bna bnb bne bni bnk bnn bno bnt boa bob boe boi bok bon boo bot bta btb bte bti btk btn bto btt eaa eab eae eai eak ean eao eat eba ebb ebe ebi ebk ebn ebo ebt eea eeb eee eek een eeo eet eia eib eie eii eik ein eio eit eka ekb eke eki eko ekt en- ena enb ene eni enk enn eno ent eo- eoa eob eoe eoi eok eon eoo eot eta etb ete eti etk etn eto ett ia- iaa iab iae iai ian iao iat iba ibb ibe ibi ibk ibn ibo ibt ie- iea iee iei iek ien iet iia iib iie iii iin iio iit ika ikb ike iki ikk iko ikt in- ina inb ine ini ink inn ino int io- ioa iob ioe ioi ion ioo iot ita itb ite iti itk itn ito itt k-t ka- kaa kab kae kai kak kan kao kat kba kbb kbe kbi kbk kbn kbo ke- kea keb kee kei kek ken keo ket kia kib kie kii kik kin kio kit kkb kke kki kkk kkn kkt kn- kna kne kni knk knn kno knt koa kob koe koi kok kon koo kot kta ktb kte ktk ktn kto ktt n-i naa nab nae nai nak nan nao nat nba nbb nbe nbi nbk nbn nbo nbt ne- nea neb nee nei nek nen neo net nia nib nie nii nik nin nio nit nka nke nki nkk nkn nko nkt nna nnb nne nni nnk nnn nno nnt no- noa nob noe noi nok non noo not nta ntb nte nti ntk ntn nto ntt o-i oaa oab oae oai oak oan oao oat ob- oba obb obe obi obk obn obo obt oea oeb oee oei oen oeo oet oia oib oie oii oik oin oio oit oka okb oke oki okk oko on- ona onb one oni onk onn ono ont oo- ooa oob ooi ook oon ooo oot ot- ota otb ote oti otk otn oto ott taa tab tae tai tak tan tao tat tba tbb tbe tbi tbk tbn tbo tbt te- tea teb tee tei tek ten teo tet tia tib tie tii tik tin tio tit tka tkb tke tkk tko tkt tna tnb tne tni tnk tnn tno tnt to- toa tob toe toi tok ton too tot tta ttb tte tti ttk ttn tto ttt