-er a-a a-b a-i aaa aab aad aae aah aai aar aas ab- aba abb abd abe abh abi abr abs ad- ada adb add ade adh adi adr ads aea aeb aed aee aeh aei aer aes aha ahb ahd ahe ahh ahi ahr ahs ai- aia aib aid aie aih aii air ais ar- ara arb ard are arh ari arr ars as- asa asb asd ase ash asi asr ass baa bab bad bae bah bai bar bas bba bbb bbd bbe bbh bbi bbr bbs bda bdb bdd bde bdh bdi bdr bds be- bea beb bed bee beh bei ber bes bha bhb bhd bhe bhh bhi bhr bhs bi- bia bib bid bie bih bii bir bis bra brb brd bre brh bri brr brs bsa bsb bsd bse bsh bsi bsr bss daa dab dad dae dah dai dar das dba dbb dbd dbe dbh dbi dbr dbs dda ddb ddd dde ddh ddi ddr dds de- dea deb ded dee deh dei der des dh- dha dhb dhd dhe dhh dhi dhr dhs di- dia dib did die dih dii dir dis dra drb drd dre dri drr drs dsa dsb dsd dse dsh dsi dsr dss eaa eab ead eae eah eai ear eas eba ebb ebd ebe ebh ebi ebr ebs ed- eda edb edd ede edh edi edr eds eea eeb eed eee eer ees eha ehb ehd ehe ehh ehi ehr ehs eia eib eid eie eii eir eis era erb erd ere erh eri err ers es- esa esb esd ese esh esi esr ess h-i haa hab had hae hah hai har has hba hbb hbd hbe hbh hbi hbr hbs hda hdb hdd hde hdh hdi hdr hds he- hea heb hed hee heh hei her hes hha hhb hhd hhe hhh hhi hhr hhs hia hib hid hie hih hii hir his hr- hra hrb hrd hre hrh hri hrr hrs hsa hsb hsd hse hsh hsi hsr hss i-d ia- iaa iab iad iae iah iai iar ias iba ibb ibd ibe ibh ibi ibr ibs ida idb idd ide idh idi idr ids ie- iea ied iee iei ier ies iha ihb ihd ihe ihh ihi ihr ihs iia iib iid iie iih iii iir iis ir- ira irb ird ire iri irr irs is- isa isb isd ise ish isi isr iss ra- raa rab rad rae rah rai rar ras rba rbb rbd rbe rbh rbi rbr rbs rda rdb rdd rde rdh rdi rdr rds re- rea reb red ree reh rei rer res rh- rha rhb rhd rhe rhh rhi rhr rhs ria rib rid rie rih rii rir ris rra rrb rrd rrh rri rrr rrs rsa rsb rsd rse rsh rsi rsr rss saa sab sad sae sah sai sar sas sba sbb sbd sbe sbh sbi sbr sbs sda sdb sdd sde sdh sdi sdr sds se- sea seb sed see seh sei ser ses sh- sha shb shd she shh shi shr shs sia sib sid sie sih sii sir sis sr- sra srb srd sre srh sri srr srs ss- ssa ssb ssd sse ssh ssi ssr sss