-er -ic a-a a-b a-c a-i aaa aab aac aae aah aai aak aar aas ab- aba abb abc abe abh abi abk abr abs ac- aca acb acc ace ach aci ack acr acs aea aeb aec aee aeh aei aek aer aes aha ahb ahc ahe ahh ahi ahk ahr ahs ai- aia aib aic aie aih aii aik air ais aka akb akc ake akh aki akk akr aks ar- ara arb arc are arh ari ark arr ars as- asa asb asc ase ash asi ask asr ass baa bab bac bae bah bai bak bar bas bba bbb bbc bbe bbh bbi bbk bbr bbs bca bcb bcc bce bch bci bck bcr bcs be- bea beb bec bee beh bei bek ber bes bha bhb bhc bhe bhh bhi bhk bhr bhs bi- bia bib bic bie bih bii bik bir bis bka bkb bkc bke bkk bkr bks bra brb bre brh bri brk brr brs bsa bsb bsc bse bsh bsi bsk bsr bss c-- caa cab cac cae cah cai cak car cas cba cbb cbc cbe cbh cbi cbk cbr cbs cca ccb ccc cce cch cci cck ccr ccs ce- cea ceb cec cee ceh cei cek cer ces ch- cha chb chc che chh chi chk chr chs ci- cia cib cic cie cih cii cik cir cis cka ckb ckc ckh cki cks cra crb crc cre crh cri crk crr crs csa csb csc cse csh csi csk csr css eaa eab eac eae eah eai eak ear eas eba ebb ebc ebe ebh ebi ebk ebr ebs ec- eca ecb ecc ece ech eci eck ecr ecs eea eeb eec eee eek eer ees eha ehb ehc ehe ehh ehi ehr ehs eia eib eic eie eii eik eir eis eka ekb ekc eke ekh eki ekr eks era erb erc ere erh eri erk err ers es- esa esb esc ese esh esi esk esr ess h-i haa hab hac hae hah hai hak har has hba hbb hbc hbe hbh hbi hbk hbr hbs hca hcb hcc hce hch hci hck hcr hcs he- hea heb hec hee heh hei hek her hes hha hhb hhc hhe hhh hhi hhk hhr hhs hia hib hic hie hih hii hik hir his hka hkb hkh hki hkk hkr hks hr- hra hrb hrc hre hrh hri hrk hrr hrs hsa hsb hsc hse hsh hsi hsk hsr hss ia- iaa iab iac iae iah iai iar ias iba ibb ibc ibe ibh ibi ibk ibr ibs ica icb icc ice ich ici ick icr ics ie- iea iec iee iei iek ier ies iha ihb ihc ihe ihh ihi ihk ihr ihs iia iib iic iie iih iii iir iis ika ikb ikc ike iki ikk ikr iks ir- ira irb irc ire iri irk irr irs is- isa isb isc ise ish isi isk isr iss ka- kaa kab kac kae kah kai kak kar kas kba kbb kbc kbe kbh kbi kbk kbr kbs kca kcb kcc kce kch kci kck kcr kcs ke- kea keb kec kee keh kei kek ker kes kha khe khh khi khk khr khs kia kib kic kie kih kii kik kir kis kkb kkc kke kkh kki kkk kkr kks kra krc kri krk krr krs ksa ksb ksc kse ksh ksi ksk ksr kss ra- raa rab rac rae rah rai rak rar ras rba rbb rbc rbe rbh rbi rbk rbr rbs rca rcb rcc rce rch rci rcr rcs re- rea reb rec ree reh rei rek rer res rh- rha rhb rhc rhe rhh rhi rhr rhs ria rib ric rie rih rii rik rir ris rkb rkc rke rkk rks rra rrb rrc rrh rri rrk rrr rrs rsa rsb rsc rse rsh rsi rsk rsr rss saa sab sac sae sah sai sak sar sas sba sbb sbc sbe sbh sbi sbk sbr sbs sca scb scc sce sch sci sck scr scs se- sea seb sec see seh sei sek ser ses sh- sha shb shc she shh shi shk shr shs sia sib sic sie sih sii sik sir sis sk- ska skb skc ske skh ski skk skr sks sr- sra srb src sre srh sri srk srr srs ss- ssa ssb ssc sse ssh ssi ssk ssr sss