a-a a-b a-z aaa aab aag aah aao aar aau aaz ab- aba abb abg abh abo abr abu abz ag- aga agb agg agh ago agr agu agz aha ahb ahg ahh aho ahr ahu ahz aoa aob aog aoh aoo aor aou ar- ara arb arg arh aro arr aru arz au- aua aub aug auh auo aur auz az- aza azb azg azo azu azz b-u baa bab bag bah bao bar bau baz bba bbb bbg bbh bbo bbr bbu bga bgb bgg bgh bgo bgr bgu bgz bha bhb bhg bhh bho bhr bhu boa bob bog boh boo bor bou boz bra brb brg brh bro brr bru brz bua bub bug buh buo bur buu buz bza bzh bzo bzr bzu bzz gaa gab gag gah gao gar gau gaz gba gbg gbh gbo gbr gbu gbz gga ggb ggg ggh ggo ggr ggu ggz gha ghb ghg ghh gho ghr ghz goa gob gog goh goo gor gou goz gra grb grg grh gro grr gru gu- gua gub gug guo gur guu guz gza gzo gzr gzu haa hab hag hah hao har hau haz hba hbb hbg hbh hbo hbr hbu hbz hga hgb hgg hgh hgo hgr hgu hha hhb hhg hhh hho hhr hhu hhz hoa hob hog hoh hoo hor hou hr- hra hrb hrg hrh hro hrr hru hrz hua hub hug huh huo hur huu huz hzo oaa oab oag oah oao oar oau ob- oba obb obg obh obo obr obu oga ogg ogh ogo oha ohg ohh oho ohr ohu oo- ooa oob oog ooh ooo oor or- ora orb org orh oro orr oru orz ou- oua ouh ouo our oza ozo ozu ozz ra- raa rab rag rah rao rar rau raz rba rbb rbg rbh rbo rbr rbu rga rgb rgg rgh rgo rgr rh- rha rhb rhg rhh rho rhr rhu roa rob rog roh roo ror rou roz rra rrb rrg rrh rrr rru rua rub rug ruh ruo rur ruu ruz rza rzb rzo ua- uaa uab uag uah uao uar uau uaz uba ubb ubg ubh ubo ubr ubu uga ugb ugg ugh ugo ugr ugu uha uhb uhh uho uhr uhu uoa uob uog uoo uor ur- ura urb urg uro urr uru urz uua uug uur uuu uza uzb uzh uzo uzu z-g zaa zab zag zah zao zar zaz zbb zbr zgb zgg zha zho zhr zhu zo- zoa zob zog zoo zor zou zrh zro zub zug zur zuz zzr zzz