-ic a-a a-b a-c a-i aaa aab aac aad aae aai aak aam aao ab- aba abb abc abd abe abi abk abm abo ac- aca acb acc acd ace aci ack acm aco ad- ada adb adc add ade adi adk adm ado aea aeb aec aed aee aei aek aem aeo ai- aia aib aic aid aie aii aik aim aio aka akb akc akd ake aki akk akm ako ama amb amc amd ame ami amk amm amo aoa aob aoc aod aoe aoi aok aom aoo baa bab bac bad bae bai bak bam bao bba bbb bbc bbd bbe bbi bbk bbm bbo bca bcb bcc bcd bce bci bck bcm bco bda bdb bdc bdd bde bdi bdk bdm bdo be- bea beb bec bed bee bei bek bem beo bi- bia bib bic bid bie bii bik bim bio bka bkb bkc bke bkk bkm bko bma bmb bmc bmd bme bmi bmk bmm bmo boa bob boc bod boe boi bok bom boo c-- caa cab cac cad cae cai cak cam cao cba cbb cbc cbd cbe cbi cbk cbm cbo cca ccb ccc ccd cce cci cck ccm cco cda cdb cdc cdd cde cdi cdk cdm cdo ce- cea ceb cec ced cee cei cek cem ceo ci- cia cib cic cid cie cii cik cim cio cka ckb ckc ckd cki ckm cko cma cmb cmc cmd cme cmi cmk cmm cmo co- coa cob coc cod coe coi cok com coo daa dab dac dad dae dai dak dam dao dba dbb dbc dbd dbe dbi dbk dbm dbo dca dcb dcc dcd dce dci dck dcm dco dda ddb ddc ddd dde ddi ddk ddm ddo de- dea deb dec ded dee dei dek dem deo di- dia dib dic did die dii dik dim dio dka dkb dkc dke dki dkk dkm dko dma dmb dmc dmd dme dmi dmk dmm dmo doa dob doc dod doe doi dok dom doo eaa eab eac ead eae eai eak eam eao eba ebb ebc ebd ebe ebi ebk ebm ebo ec- eca ecb ecc ecd ece eci eck ecm eco ed- eda edb edc edd ede edi edk edm edo eea eeb eec eed eee eek eem eeo eia eib eic eid eie eii eik eim eio eka ekb ekc ekd eke eki eko em- ema emb emc emd eme emi emk emm emo eo- eoa eob eoc eod eoe eoi eok eom eoo i-d ia- iaa iab iac iad iae iai iam iao iba ibb ibc ibd ibe ibi ibk ibm ibo ica icb icc icd ice ici ick icm ico ida idb idc idd ide idi idk idm ido ie- iea iec ied iee iei iek iem iia iib iic iid iie iii iim iio ika ikb ikc ike iki ikk iko im- ima imb imc imd ime imi imm imo io- ioa iob ioc iod ioe ioi iom ioo ka- kaa kab kac kad kae kai kak kam kao kba kbb kbc kbd kbe kbi kbk kbm kbo kca kcb kcc kcd kce kci kck kcm kda kdb kdc kde kdk kdm kdo ke- kea keb kec ked kee kei kek kem keo kia kib kic kid kie kii kik kim kio kkb kkc kke kki kkk kkm kma kmb kmc kmd kme kmi kmk kmm kmo koa kob koc kod koe koi kok kom koo m-o maa mab mac mad mae mai mak mam mao mba mbb mbc mbd mbe mbi mbk mbm mbo mc- mca mcb mcc mcd mce mci mck mcm mco mda mdb mdc mdd mde mdi mdk mdm mdo mea meb mec med mee mei mek mem meo mi- mia mib mic mid mie mii mik mim mio mka mkb mkc mkd mke mkk mkm mko mma mmb mmc mmd mme mmi mmk mmm mmo moa mob moc mod moe moi mok mom moo o-i oaa oab oac oad oae oai oak oam oao ob- oba obb obc obd obe obi obk obm obo oc- oca ocb occ ocd oci ock ocm oco oda odb odc odd ode odi odm odo oea oeb oec oed oee oei oem oeo oia oib oic oid oie oii oik oim oio oka okb okc okd oke oki okk oko om- oma omb omc omd ome omi omm omo oo- ooa oob ooc ood ooi ook oom ooo