-al -ic -ol a-a a-b a-c a-i aaa aab aac aae aaf aai aal aao ab- aba abb abc abe abf abi abl abo ac- aca acb acc ace acf aci acl aco aea aeb aec aee aef aei ael aeo af- afa afb afc afe aff afi afl afo ai- aia aib aic aie aif aii ail aio al- ala alb alc ale alf ali all alo aoa aob aoc aoe aof aoi aol aoo baa bab bac bae baf bai bal bao bba bbb bbc bbe bbf bbi bbl bbo bca bcb bcc bce bcf bci bcl bco be- bea beb bec bee bef bei bel beo bfa bfb bfc bfe bff bfi bfl bfo bi- bia bib bic bie bif bii bil bio bla blb blc ble blf bli bll blo boa bob boc boe bof boi bol boo c-- caa cab cac cae caf cai cal cao cba cbb cbc cbe cbf cbi cbl cbo cca ccb ccc cce ccf cci ccl cco ce- cea ceb cec cee cef cei cel ceo cfa cfb cfc cfe cff cfi cfl cfo ci- cia cib cic cie cif cii cil cio cl- cla clb clc cle clf cli cll clo co- coa cob coc coe cof coi col coo eaa eab eac eae eaf eai eal eao eba ebb ebc ebe ebf ebi ebl ebo ec- eca ecb ecc ece ecf eci ecl eco eea eeb eec eee eef eel eeo ef- efa efb efc efe eff efi efl efo eia eib eic eie eif eii eil eio ela elb elc ele elf eli ell elo eo- eoa eob eoc eoe eof eoi eol eoo faa fab fac fae faf fai fal fao fba fbb fbc fbe fbf fbi fbl fbo fca fcb fcc fce fcf fci fcl fco fea feb fec fee fef fei fel feo ffa ffc ffe fff ffi ffl ffo fia fib fic fie fif fii fil fla flb flc fle flf fli fll flo foa fob foc foe fof foi fol foo i-f ia- iaa iab iac iae iaf iai ial iao iba ibb ibc ibe ibf ibi ibl ibo ica icb icc ice icf ici icl ico ie- iea iec iee ief iei iel ifa ifb ifc ife iff ifi ifl ifo iia iib iic iie iif iii iil iio il- ila ilb ilc ile ilf ili ill ilo io- ioa iob ioc ioe iof ioi iol ioo la- laa lab lac lae laf lai lal lao lba lbb lbc lbe lbf lbi lbl lbo lca lcb lcc lce lcf lci lcl lco lea leb lec lee lef lei lel leo lfa lfb lfc lfe lff lfi lfl lfo lia lib lic lie lif lii lil lio lla llb llc lle llf lli lll llo loa lob loc loe lof loi lol loo o-i oaa oab oac oae oaf oai oal oao ob- oba obb obc obe obf obi obl obo oc- oca ocb occ ocf oci ocl oco oea oeb oec oee oef oei oel oeo of- ofa ofb ofc ofe off ofi ofl ofo oia oib oic oie oif oii oil oio ola olb olc ole olf oli oll olo oo- ooa oob ooc oof ooi ool ooo