a-a a-b a-i aaa aab aae aah aai aan aao ab- aba abb abe abh abi abn abo aea aeb aee aeh aei aen aeo aha ahb ahe ahh ahi ahn aho ai- aia aib aie aih aii ain aio an- ana anb ane anh ani ann ano aoa aob aoe aoh aoi aon aoo baa bab bae bah bai ban bao bba bbb bbe bbh bbi bbn bbo be- bea beb bee beh bei ben beo bha bhb bhe bhh bhi bho bi- bia bib bie bih bii bin bio bna bnb bne bni bnn bno boa bob boe boh boi bon boo eaa eab eae eah eai ean eao eba ebb ebe ebh ebi ebn ebo eea eeb eee een eeo eha ehb ehe ehh ehi ehn eho eia eib eie eii ein eio en- ena enb ene enh eni enn eno eo- eoa eob eoe eoh eoi eon eoo h-i haa hab hae hah hai han hao hba hbb hbe hbh hbi hbn hbo he- hea heb hee heh hei hen heo hha hhb hhe hhh hhi hhn hho hia hib hie hih hii hin hio hna hnb hne hnh hnn hno hoa hob hoe hoh hoi hon hoo ia- iaa iab iae iah iai ian iao iba ibb ibe ibh ibi ibn ibo ie- iea iee iei ien iha ihb ihe ihh ihi ihn iho iia iib iie iih iii iin iio in- ina inb ine inh ini inn ino io- ioa iob ioe ioh ioi ion ioo n-i naa nab nae nah nai nan nao nba nbb nbe nbi nbn nbo ne- nea neb nee neh nei nen neo nha nhb nhe nhh nhi nhn nia nib nie nih nii nin nio nna nnb nne nnh nni nnn nno no- noa nob noe noh noi non noo o-i oaa oab oae oah oai oan oao ob- oba obb obe obh obi obn obo oea oeb oee oeh oei oen oeo oha ohe ohh ohi ohn oho oia oib oie oii oin oio on- ona onb one onh oni onn ono oo- ooa oob ooh ooi oon ooo