-th a-a a-b a-t aaa aab aah aak aao aar aat ab- aba abb abh abk abo abr abt aha ahb ahh ahk aho ahr aht aka akb akh akk ako akr aoa aob aoh aok aoo aor aot ar- ara arb arh ark aro arr art at- ata atb ath ato atr att baa bab bah bak bao bar bat bba bbb bbh bbk bbo bbr bbt bha bhb bhh bhk bho bhr bht bka bkb bkk bko bkr bkt boa bob boh bok boo bor bot bra brb brh brk bro brr brt bta btb bth btk bto btr btt haa hab hah hak hao har hat hba hbb hbh hbk hbo hbr hbt hha hhb hhh hhk hho hhr hht hka hkb hkh hkk hko hkr hkt hoa hob hoh hok hoo hor hot hr- hra hrb hrh hrk hro hrr hrt hta htb hth htk hto htr htt k-t ka- kaa kab kah kak kao kar kat kba kbb kbh kbk kbo kbr kha khh khk kho khr kkb kkh kkk kkr kkt koa kob koh kok koo kor kot kra krk kro krr krt kta ktb kth ktk kto ktr ktt oaa oab oah oak oao oar oat ob- oba obb obh obk obo obr obt oha ohh oho ohr oht oka okb okk oko okr oo- ooa oob ooh ook ooo oor oot or- ora orb orh ork oro orr ort ot- ota otb oth otk oto otr ott ra- raa rab rah rak rao rar rat rba rbb rbh rbk rbo rbr rbt rh- rha rhb rhh rho rhr rht rkb rkk rko rkt roa rob roh rok roo ror rot rra rrb rrh rrk rrr rrt rta rtb rtk rto rtr rtt taa tab tah tak tao tar tat tba tbb tbh tbk tbo tbr tbt th- tha thb thh thk tho thr tht tka tkb tkk tko tkr tkt to- toa tob toh tok too tor tot tra trb trh trk tro trr trt tta ttb tth ttk tto ttr ttt