-al -ic -ol a-a a-b a-c a-i aaa aab aac aai aal aao aar aas ab- aba abb abc abi abl abo abr abs ac- aca acb acc aci acl aco acr acs ai- aia aib aic aii ail aio air ais al- ala alb alc ali all alo alr als aoa aob aoc aoi aol aoo aor aos ar- ara arb arc ari arl aro arr ars as- asa asb asc asi asl aso asr ass baa bab bac bai bal bao bar bas bba bbb bbc bbi bbl bbo bbr bbs bca bcb bcc bci bcl bco bcr bcs bi- bia bib bic bii bil bio bir bis bla blb blc bli bll blo blr bls boa bob boc boi bol boo bor bos bra brb bri brl bro brr brs bsa bsb bsc bsi bsl bso bsr bss c-- caa cab cac cai cal cao car cas cba cbb cbc cbi cbl cbo cbr cbs cca ccb ccc cci ccl cco ccr ccs ci- cia cib cic cii cil cio cir cis cl- cla clb clc cli cll clo clr cls co- coa cob coc coi col coo cor cos cra crb crc cri crl cro crr crs csa csb csc csi csl cso csr css ia- iaa iab iac iai ial iao iar ias iba ibb ibc ibi ibl ibo ibr ibs ica icb icc ici icl ico icr ics iia iib iic iii iil iio iir iis il- ila ilb ilc ili ill ilo ilr ils io- ioa iob ioc ioi iol ioo ior ios ir- ira irb irc iri irl iro irr irs is- isa isb isc isi isl iso isr iss la- laa lab lac lai lal lao lar las lba lbb lbc lbi lbl lbo lbr lbs lca lcb lcc lci lcl lco lcr lcs lia lib lic lii lil lio lir lis lla llb llc lli lll llo llr lls loa lob loc loi lol loo lor los lra lrb lrc lri lro lrr lrs lsa lsb lsc lsi lsl lso lsr lss o-i oaa oab oac oai oal oao oar oas ob- oba obb obc obi obl obo obr obs oc- oca ocb occ oci ocl oco ocr ocs oia oib oic oii oil oio oir ois ola olb olc oli oll olo ols oo- ooa oob ooc ooi ool ooo oor oos or- ora orb orc ori orl oro orr ors os- osa osb osc osi osl oso osr oss ra- raa rab rac rai ral rao rar ras rba rbb rbc rbi rbl rbo rbr rbs rca rcb rcc rci rcl rco rcr rcs ria rib ric rii ril rio rir ris rla rlc rli rll rlo rlr rls roa rob roc roi rol roo ror ros rra rrb rrc rri rrl rrr rrs rsa rsb rsc rsi rsl rso rsr rss saa sab sac sai sal sao sar sas sba sbb sbc sbi sbl sbo sbr sbs sca scb scc sci scl sco scr scs sia sib sic sii sil sio sir sis sla slb slc sli sll slo slr sls soa sob soc soi sol soo sor sos sr- sra srb src sri srl sro srr srs ss- ssa ssb ssc ssi ssl sso ssr sss