-th a-a a-t aaa aah aao aar aat aax aha ahh aho ahr aht ahx aoa aoh aoo aor aot aox ar- ara arh aro arr art arx at- ata ath ato atr att atx ax- axa axh axo axr axt axx haa hah hao har hat hax hha hhh hho hhr hht hoa hoh hoo hor hot hox hr- hra hrh hro hrr hrt hta hth hto htr htt htx oaa oah oao oar oat oax oha ohh oho ohr oht oo- ooa ooh ooo oor oot oox or- ora orh oro orr ort orx ot- ota oth oto otr ott ox- oxa oxo oxt oxx ra- raa rah rao rar rat rax rh- rha rhh rho rhr rht roa roh roo ror rot rox rra rrh rrr rrt rta rto rtr rtt rtx rxr t-x taa tah tao tar tat tax th- tha thh tho thr tht thx to- toa toh too tor tot tox tra trh tro trr trt trx tta tth tto ttr ttt ttx txt xaa xar xat xht xoa xoo xor xot xox xrt xrx xtr xtx xxo xxx