a-a a-b a-z aaa aab aak aao aar aaw aay aaz ab- aba abb abk abo abr abw aby abz aka akb akk ako akr akw aoa aob aok aoo aor aow ar- ara arb ark aro arr arw ary arz aw- awa awb awk awo awr aww awy ay- aya ayk ayo ayr ayw ayz az- aza azb azo azw azy azz baa bab bak bao bar baw bay baz bba bbb bbk bbo bbr bbw bby bka bkb bkk bko bkr bkw boa bob bok boo bor bow boy boz bra brb brk bro brr brw bry brz bwa bwb bwk bwo bwr bwy by- bya byk byo byr byz bza bzo bzr bzz k-z ka- kaa kab kak kao kar kaw kay kaz kba kbb kbk kbo kbr kbw kbz kkb kkk kkr kky koa kob kok koo kor kow koy koz kra krk kro krr krw kry kw- kwa kwk kwo kww kya kyo kyr kyw kyz kzo kzw kzy oaa oab oak oao oar oaw ob- oba obb obk obo obr obw oby oka okb okk oko okr okw oo- ooa oob ook ooo oor oow or- ora orb ork oro orr ory orz owa owb owk owo oww oya oyo oza ozo ozw ozz ra- raa rab rak rao rar raw ray raz rba rbb rbk rbo rbr rbw rkb rkk rko rky rkz roa rob rok roo ror row roy roz rra rrb rrk rrr rwa rwb rwr rwy ry- rya ryk ryo ryr ryy ryz rza rzb rzo rzy waa wab wak wao war waw way waz wba wbb wbo wbr wbw wbz wka wkb wko wkr wkw wky woa wob wok woo wor wow woy woz wr- wra wrk wro wrr wrw wry wwa wwo www wy- wya wyk wyo wyr yaa yab yak yao yar yaw yay yaz ybr yby ybz yka ykk yob yok yoo yor yow yoy yra yro yyb yyy yyz yzb yzr yzy zaa zab zak zao zar zay zaz zbb zbr zbw zby zka zo- zoa zob zok zoo zor zow zro zzr zzy zzz