-al -ic -ol a-a a-b a-c a-i a-t aaa aab aac aai aal aao aar aat ab- aba abb abc abi abl abo abr abt ac- aca acb acc aci acl aco acr act ai- aia aib aic aii ail aio air ait al- ala alb alc ali all alo alr alt aoa aob aoc aoi aol aoo aor aot ar- ara arb arc ari arl aro arr art at- ata atb atc ati atl ato atr att baa bab bac bai bal bao bar bat bba bbb bbc bbi bbl bbo bbr bbt bca bcb bcc bci bcl bco bcr bct bi- bia bib bic bii bil bio bir bit bla blb blc bli bll blo blr blt boa bob boc boi bol boo bor bot bra brb bri brl bro brr brt bta btb btc bti btl bto btr btt c-- caa cab cac cai cal cao car cat cba cbb cbc cbi cbl cbo cbr cbt cca ccb ccc cci ccl cco ccr cct ci- cia cib cic cii cil cio cir cit cl- cla clb clc cli cll clo clr clt co- coa cob coc coi col coo cor cot cra crb crc cri crl cro crr crt cta ctb ctc cti ctl cto ctr ctt ia- iaa iab iac iai ial iao iar iat iba ibb ibc ibi ibl ibo ibr ibt ica icb icc ici icl ico icr ict iia iib iic iii iil iio iir iit il- ila ilb ilc ili ill ilo ilr ilt io- ioa iob ioc ioi iol ioo ior iot ir- ira irb irc iri irl iro irr irt ita itb itc iti itl ito itt la- laa lab lac lai lal lao lar lat lba lbb lbc lbi lbl lbo lbr lbt lca lcb lcc lci lcl lco lcr lct lia lib lic lii lil lio lir lit lla llb llc lli lll llo llr llt loa lob loc loi lol loo lor lot lra lrb lrc lri lro lrr lrt lta ltb ltc lti ltl lto ltr ltt o-i oaa oab oac oai oal oao oar oat ob- oba obb obc obi obl obo obr obt oc- oca ocb occ oci ocl oco ocr oct oia oib oic oii oil oio oir oit ola olb olc oli oll olo olt oo- ooa oob ooc ooi ool ooo oor oot or- ora orb orc ori orl oro orr ort ot- ota otb otc oti otl oto otr ott ra- raa rab rac rai ral rao rar rat rba rbb rbc rbi rbl rbo rbr rbt rca rcb rcc rci rcl rco rcr rct ria rib ric rii ril rio rir rit rla rlc rli rll rlo rlr rlt roa rob roc roi rol roo ror rot rra rrb rrc rri rrl rrr rrt rta rtb rtc rti rtl rto rtr rtt taa tab tac tai tal tao tar tat tba tbb tbc tbi tbl tbo tbr tbt tca tcb tcc tci tcl tco tcr tct tia tib tic tii til tio tir tit tla tlc tli tll tlo tlr tlt to- toa tob toc toi tol too tor tot tra trb trc tri trl tro trr trt tta ttb ttc tti ttl tto ttr ttt