a-a a-b a-i aaa aab aad aah aai aao aar ab- aba abb abd abh abi abo abr ad- ada adb add adh adi ado adr aha ahb ahd ahh ahi aho ahr ai- aia aib aid aih aii aio air aoa aob aod aoh aoi aoo aor ar- ara arb ard arh ari aro arr baa bab bad bah bai bao bar bba bbb bbd bbh bbi bbo bbr bda bdb bdd bdh bdi bdo bdr bha bhb bhd bhh bhi bho bhr bi- bia bib bid bih bii bio bir boa bob bod boh boi boo bor bra brb brd brh bri bro brr daa dab dad dah dai dao dar dba dbb dbd dbh dbi dbo dbr dda ddb ddd ddh ddi ddo ddr dh- dha dhb dhd dhh dhi dho dhr di- dia dib did dih dii dio dir doa dob dod doh doi doo dor dra drb drd dri dro drr h-i haa hab had hah hai hao har hba hbb hbd hbh hbi hbo hbr hda hdb hdd hdh hdi hdo hdr hha hhb hhd hhh hhi hho hhr hia hib hid hih hii hio hir hoa hob hod hoh hoi hoo hor hr- hra hrb hrd hrh hri hro hrr i-d ia- iaa iab iad iah iai iao iar iba ibb ibd ibh ibi ibo ibr ida idb idd idh idi ido idr iha ihb ihd ihh ihi iho ihr iia iib iid iih iii iio iir io- ioa iob iod ioh ioi ioo ior ir- ira irb ird iri iro irr o-i oaa oab oad oah oai oao oar ob- oba obb obd obh obi obo obr oda odb odd odh odi odo odr oha ohd ohh ohi oho ohr oia oib oid oii oio oir oo- ooa oob ood ooh ooi ooo oor or- ora orb ord orh ori oro orr ra- raa rab rad rah rai rao rar rba rbb rbd rbh rbi rbo rbr rda rdb rdd rdh rdi rdo rdr rh- rha rhb rhd rhh rhi rho rhr ria rib rid rih rii rio rir roa rob rod roh roi roo ror rra rrb rrd rrh rri rrr