-al -ic -ol a-a a-b a-c a-i a-t aaa aab aac aai aal aao aas aat ab- aba abb abc abi abl abo abs abt ac- aca acb acc aci acl aco acs act ai- aia aib aic aii ail aio ais ait al- ala alb alc ali all alo als alt aoa aob aoc aoi aol aoo aos aot as- asa asb asc asi asl aso ass ast at- ata atb atc ati atl ato ats att baa bab bac bai bal bao bas bat bba bbb bbc bbi bbl bbo bbs bbt bca bcb bcc bci bcl bco bcs bct bi- bia bib bic bii bil bio bis bit bla blb blc bli bll blo bls blt boa bob boc boi bol boo bos bot bsa bsb bsc bsi bsl bso bss bst bta btb btc bti btl bto bts btt c-- caa cab cac cai cal cao cas cat cba cbb cbc cbi cbl cbo cbs cbt cca ccb ccc cci ccl cco ccs cct ci- cia cib cic cii cil cio cis cit cl- cla clb clc cli cll clo cls clt co- coa cob coc coi col coo cos cot csa csb csc csi csl cso css cst cta ctb ctc cti ctl cto cts ctt ia- iaa iab iac iai ial iao ias iat iba ibb ibc ibi ibl ibo ibs ibt ica icb icc ici icl ico ics ict iia iib iic iii iil iio iis iit il- ila ilb ilc ili ill ilo ils ilt io- ioa iob ioc ioi iol ioo ios iot is- isa isb isc isi isl iso iss ist ita itb itc iti itl ito its itt la- laa lab lac lai lal lao las lat lba lbb lbc lbi lbl lbo lbs lbt lca lcb lcc lci lcl lco lcs lct lia lib lic lii lil lio lis lit lla llb llc lli lll llo lls llt loa lob loc loi lol loo los lot lsa lsb lsc lsi lsl lso lss lst lta ltb ltc lti ltl lto lts ltt o-i oaa oab oac oai oal oao oas oat ob- oba obb obc obi obl obo obs obt oc- oca ocb occ oci ocl oco ocs oct oia oib oic oii oil oio ois oit ola olb olc oli oll olo ols olt oo- ooa oob ooc ooi ool ooo oos oot os- osa osb osc osi osl oso oss ost ot- ota otb otc oti otl oto ots ott saa sab sac sai sal sao sas sat sba sbb sbc sbi sbl sbo sbs sbt sca scb scc sci scl sco scs sct sia sib sic sii sil sio sis sit sla slb slc sli sll slo sls slt soa sob soc soi sol soo sos sot ss- ssa ssb ssc ssi ssl sso sss sst sta stb stc sti stl sto sts stt taa tab tac tai tal tao tas tat tba tbb tbc tbi tbl tbo tbs tbt tca tcb tcc tci tcl tco tcs tct tia tib tic tii til tio tis tit tla tlc tli tll tlo tls tlt to- toa tob toc toi tol too tos tot tsa tsb tsc tsi tsl tso tss tst tta ttb ttc tti ttl tto tts ttt