a-a a-b a-i aaa aab aad aaf aah aai aar aas ab- aba abb abd abf abh abi abr abs ad- ada adb add adf adh adi adr ads af- afa afb afd aff afh afi afr afs aha ahb ahd ahf ahh ahi ahr ahs ai- aia aib aid aif aih aii air ais ar- ara arb ard arf arh ari arr ars as- asa asb asd asf ash asi asr ass baa bab bad baf bah bai bar bas bba bbb bbd bbf bbh bbi bbr bbs bda bdb bdd bdf bdh bdi bdr bds bfa bfb bfd bff bfh bfi bfr bfs bha bhb bhd bhf bhh bhi bhr bhs bi- bia bib bid bif bih bii bir bis bra brb brd brf brh bri brr brs bsa bsb bsd bsf bsh bsi bsr bss daa dab dad daf dah dai dar das dba dbb dbd dbf dbh dbi dbr dbs dda ddb ddd ddf ddh ddi ddr dds dfa dfb dfd dff dfh dfi dfr dfs dh- dha dhb dhd dhf dhh dhi dhr dhs di- dia dib did dif dih dii dir dis dra drb drd dri drr drs dsa dsb dsd dsf dsh dsi dsr dss faa fab fad faf fah fai far fas fba fbb fbd fbf fbh fbi fbr fbs fda fdb fdd fdf fdh fdi fdr fds ffa ffd fff ffh ffi ffr ffs fha fhb fhf fhh fhi fhr fhs fia fib fid fif fih fii fir fis fra frb frd frf frh fri frr frs fsa fsb fsd fsf fsh fsi fsr fss h-i haa hab had haf hah hai har has hba hbb hbd hbf hbh hbi hbr hbs hda hdb hdd hdf hdh hdi hdr hds hfa hfb hfd hff hfh hfi hfr hfs hha hhb hhd hhf hhh hhi hhr hhs hia hib hid hif hih hii hir his hr- hra hrb hrd hrf hrh hri hrr hrs hsa hsb hsd hsf hsh hsi hsr hss i-d i-f ia- iaa iab iad iaf iah iai iar ias iba ibb ibd ibf ibh ibi ibr ibs ida idb idd idf idh idi idr ids ifa ifb ifd iff ifi ifr ifs iha ihb ihd ihf ihh ihi ihr ihs iia iib iid iif iih iii iir iis ir- ira irb ird irf iri irr irs is- isa isb isd isf ish isi isr iss ra- raa rab rad raf rah rai rar ras rba rbb rbd rbf rbh rbi rbr rbs rda rdb rdd rdf rdh rdi rdr rds rfa rfb rfd rff rfh rfi rfr rfs rh- rha rhb rhd rhf rhh rhi rhr rhs ria rib rid rif rih rii rir ris rra rrb rrd rrf rrh rri rrr rrs rsa rsb rsd rsf rsh rsi rsr rss saa sab sad saf sah sai sar sas sba sbb sbd sbf sbh sbi sbr sbs sda sdb sdd sdf sdh sdi sdr sds sfa sfb sfd sff sfh sfi sfr sfs sh- sha shb shd shf shh shi shr shs sia sib sid sif sih sii sir sis sr- sra srb srd srf srh sri srr srs ss- ssa ssb ssd ssf ssh ssi ssr sss