a-a a-b a-i aaa aab aad aaf aah aai aak aar ab- aba abb abd abf abh abi abk abr ad- ada adb add adf adh adi adk adr af- afa afb afd aff afh afi afk afr aha ahb ahd ahf ahh ahi ahk ahr ai- aia aib aid aif aih aii aik air aka akb akd akh aki akk akr ar- ara arb ard arf arh ari ark arr baa bab bad baf bah bai bak bar bba bbb bbd bbf bbh bbi bbk bbr bda bdb bdd bdf bdh bdi bdk bdr bfa bfb bfd bff bfh bfi bfr bha bhb bhd bhf bhh bhi bhk bhr bi- bia bib bid bif bih bii bik bir bka bkb bkf bkk bkr bra brb brd brf brh bri brk brr daa dab dad daf dah dai dak dar dba dbb dbd dbf dbh dbi dbk dbr dda ddb ddd ddf ddh ddi ddk ddr dfa dfb dfd dff dfh dfi dfk dfr dh- dha dhb dhd dhf dhh dhi dhk dhr di- dia dib did dif dih dii dik dir dka dkb dki dkk dkr dra drb drd dri drk drr faa fab fad faf fah fai fak far fba fbb fbd fbf fbh fbi fbk fbr fda fdb fdd fdf fdh fdi fdk fdr ffa ffd fff ffh ffi ffk ffr fha fhb fhf fhh fhi fhr fia fib fid fif fih fii fik fir fka fkb fkf fki fkk fra frb frd frf frh fri frk frr h-i haa hab had haf hah hai hak har hba hbb hbd hbf hbh hbi hbk hbr hda hdb hdd hdf hdh hdi hdk hdr hfa hfb hfd hff hfh hfi hfk hfr hha hhb hhd hhf hhh hhi hhk hhr hia hib hid hif hih hii hik hir hka hkb hkd hkf hkh hki hkk hkr hr- hra hrb hrd hrf hrh hri hrk hrr i-d i-f ia- iaa iab iad iaf iah iai iar iba ibb ibd ibf ibh ibi ibk ibr ida idb idd idf idh idi idk idr ifa ifb ifd iff ifi ifr iha ihb ihd ihf ihh ihi ihk ihr iia iib iid iif iih iii iir ika ikb ikf iki ikk ikr ir- ira irb ird irf iri irk irr ka- kaa kab kad kaf kah kai kak kar kba kbb kbd kbf kbh kbi kbk kbr kda kdb kdf kdh kdk kdr kfa kfd kff kfh kfi kha khf khh khi khk khr kia kib kid kif kih kii kik kir kkb kkh kki kkk kkr kra krd krf kri krk krr ra- raa rab rad raf rah rai rak rar rba rbb rbd rbf rbh rbi rbk rbr rda rdb rdd rdf rdh rdi rdr rfa rfb rfd rff rfh rfi rfk rfr rh- rha rhb rhd rhf rhh rhi rhr ria rib rid rif rih rii rik rir rkb rkf rkk rra rrb rrd rrf rrh rri rrk rrr