-er -ic a-a a-b a-c a-i aaa aab aac aae aah aai aao aar aas ab- aba abb abc abe abh abi abo abr abs ac- aca acb acc ace ach aci aco acr acs aea aeb aec aee aeh aei aeo aer aes aha ahb ahc ahe ahh ahi aho ahr ahs ai- aia aib aic aie aih aii aio air ais aoa aob aoc aoe aoh aoi aoo aor aos ar- ara arb arc are arh ari aro arr ars as- asa asb asc ase ash asi aso asr ass baa bab bac bae bah bai bao bar bas bba bbb bbc bbe bbh bbi bbo bbr bbs bca bcb bcc bce bch bci bco bcr bcs be- bea beb bec bee beh bei beo ber bes bha bhb bhc bhe bhh bhi bho bhr bhs bi- bia bib bic bie bih bii bio bir bis boa bob boc boe boh boi boo bor bos bra brb bre brh bri bro brr brs bsa bsb bsc bse bsh bsi bso bsr bss c-- caa cab cac cae cah cai cao car cas cba cbb cbc cbe cbh cbi cbo cbr cbs cca ccb ccc cce cch cci cco ccr ccs ce- cea ceb cec cee ceh cei ceo cer ces ch- cha chb chc che chh chi cho chr chs ci- cia cib cic cie cih cii cio cir cis co- coa cob coc coe coh coi coo cor cos cra crb crc cre crh cri cro crr crs csa csb csc cse csh csi cso csr css eaa eab eac eae eah eai eao ear eas eba ebb ebc ebe ebh ebi ebo ebr ebs ec- eca ecb ecc ece ech eci eco ecr ecs eea eeb eec eee eeo eer ees eha ehb ehc ehe ehh ehi eho ehr ehs eia eib eic eie eii eio eir eis eo- eoa eob eoc eoe eoh eoi eoo eor eos era erb erc ere erh eri ero err ers es- esa esb esc ese esh esi eso esr ess h-i haa hab hac hae hah hai hao har has hba hbb hbc hbe hbh hbi hbo hbr hbs hca hcb hcc hce hch hci hco hcr hcs he- hea heb hec hee heh hei heo her hes hha hhb hhc hhe hhh hhi hho hhr hhs hia hib hic hie hih hii hio hir his hoa hob hoc hoe hoh hoi hoo hor hos hr- hra hrb hrc hre hrh hri hro hrr hrs hsa hsb hsc hse hsh hsi hsr hss ia- iaa iab iac iae iah iai iao iar ias iba ibb ibc ibe ibh ibi ibo ibr ibs ica icb icc ice ich ici ico icr ics ie- iea iec iee iei ier ies iha ihb ihc ihe ihh ihi iho ihr ihs iia iib iic iie iih iii iio iir iis io- ioa iob ioc ioe ioh ioi ioo ior ios ir- ira irb irc ire iri iro irr irs is- isa isb isc ise ish isi iso isr iss o-i oaa oab oac oae oah oai oao oar oas ob- oba obb obc obe obh obi obo obr obs oc- oca ocb occ och oci oco ocr ocs oea oeb oec oee oeh oei oeo oer oes oha ohc ohe ohh ohi oho ohr ohs oia oib oic oie oii oio oir ois oo- ooa oob ooc ooh ooi ooo oor oos or- ora orb orc ore orh ori oro orr ors os- osa osb osc ose osh osi oso osr oss ra- raa rab rac rae rah rai rao rar ras rba rbb rbc rbe rbh rbi rbo rbr rbs rca rcb rcc rce rch rci rco rcr rcs re- rea reb rec ree reh rei reo rer res rh- rha rhb rhc rhe rhh rhi rho rhr rhs ria rib ric rie rih rii rio rir ris roa rob roc roe roh roi roo ror ros rra rrb rrc rrh rri rrr rrs rsa rsb rsc rse rsh rsi rso rsr rss saa sab sac sae sah sai sao sar sas sba sbb sbc sbe sbh sbi sbo sbr sbs sca scb scc sce sch sci sco scr scs se- sea seb sec see seh sei seo ser ses sh- sha shb shc she shh shi sho shr shs sia sib sic sie sih sii sio sir sis soa sob soc soe soh soi soo sor sos sr- sra srb src sre srh sri sro srr srs ss- ssa ssb ssc sse ssh ssi sso ssr sss