-al -ic -ol a-a a-b a-c a-i aaa aab aac aaf aai aal aao aar ab- aba abb abc abf abi abl abo abr ac- aca acb acc acf aci acl aco acr af- afa afb afc aff afi afl afo afr ai- aia aib aic aif aii ail aio air al- ala alb alc alf ali all alo alr aoa aob aoc aof aoi aol aoo aor ar- ara arb arc arf ari arl aro arr baa bab bac baf bai bal bao bar bba bbb bbc bbf bbi bbl bbo bbr bca bcb bcc bcf bci bcl bco bcr bfa bfb bfc bff bfi bfl bfo bfr bi- bia bib bic bif bii bil bio bir bla blb blc blf bli bll blo blr boa bob boc bof boi bol boo bor bra brb brf bri brl bro brr c-- caa cab cac caf cai cal cao car cba cbb cbc cbf cbi cbl cbo cbr cca ccb ccc ccf cci ccl cco ccr cfa cfb cfc cff cfi cfl cfo cfr ci- cia cib cic cif cii cil cio cir cl- cla clb clc clf cli cll clo clr co- coa cob coc cof coi col coo cor cra crb crc crf cri crl cro crr faa fab fac faf fai fal fao far fba fbb fbc fbf fbi fbl fbo fbr fca fcb fcc fcf fci fcl fco fcr ffa ffc fff ffi ffl ffo ffr fia fib fic fif fii fil fir fla flb flc flf fli fll flo flr foa fob foc fof foi fol foo for fra frb frc frf fri frl fro frr i-f ia- iaa iab iac iaf iai ial iao iar iba ibb ibc ibf ibi ibl ibo ibr ica icb icc icf ici icl ico icr ifa ifb ifc iff ifi ifl ifo ifr iia iib iic iif iii iil iio iir il- ila ilb ilc ilf ili ill ilo ilr io- ioa iob ioc iof ioi iol ioo ior ir- ira irb irc irf iri irl iro irr la- laa lab lac laf lai lal lao lar lba lbb lbc lbf lbi lbl lbo lbr lca lcb lcc lcf lci lcl lco lcr lfa lfb lfc lff lfi lfl lfo lfr lia lib lic lif lii lil lio lir lla llb llc llf lli lll llo llr loa lob loc lof loi lol loo lor lra lrb lrc lrf lri lro lrr o-i oaa oab oac oaf oai oal oao oar ob- oba obb obc obf obi obl obo obr oc- oca ocb occ ocf oci ocl oco ocr of- ofa ofb ofc off ofi ofl ofo ofr oia oib oic oif oii oil oio oir ola olb olc olf oli oll olo oo- ooa oob ooc oof ooi ool ooo oor or- ora orb orc orf ori orl oro orr ra- raa rab rac raf rai ral rao rar rba rbb rbc rbf rbi rbl rbo rbr rca rcb rcc rcf rci rcl rco rcr rfa rfb rfc rff rfi rfl rfo rfr ria rib ric rif rii ril rio rir rla rlc rlf rli rll rlo rlr roa rob roc rof roi rol roo ror rra rrb rrc rrf rri rrl rrr