-ic a-a a-b a-c a-i aaa aab aac aad aae aai aam aao ab- aba abb abc abd abe abi abm abo ac- aca acb acc acd ace aci acm aco ad- ada adb adc add ade adi adm ado aea aeb aec aed aee aei aem aeo ai- aia aib aic aid aie aii aim aio ama amb amc amd ame ami amm amo aoa aob aoc aod aoe aoi aom aoo baa bab bac bad bae bai bam bao bba bbb bbc bbd bbe bbi bbm bbo bca bcb bcc bcd bce bci bcm bco bda bdb bdc bdd bde bdi bdm bdo be- bea beb bec bed bee bei bem beo bi- bia bib bic bid bie bii bim bio bma bmb bmc bmd bme bmi bmm bmo boa bob boc bod boe boi bom boo c-- caa cab cac cad cae cai cam cao cba cbb cbc cbd cbe cbi cbm cbo cca ccb ccc ccd cce cci ccm cco cda cdb cdc cdd cde cdi cdm cdo ce- cea ceb cec ced cee cei cem ceo ci- cia cib cic cid cie cii cim cio cma cmb cmc cmd cme cmi cmm cmo co- coa cob coc cod coe coi com coo daa dab dac dad dae dai dam dao dba dbb dbc dbd dbe dbi dbm dbo dca dcb dcc dcd dce dci dcm dco dda ddb ddc ddd dde ddi ddm ddo de- dea deb dec ded dee dei dem deo di- dia dib dic did die dii dim dio dma dmb dmc dmd dme dmi dmm dmo doa dob doc dod doe doi dom doo eaa eab eac ead eae eai eam eao eba ebb ebc ebd ebe ebi ebm ebo ec- eca ecb ecc ecd ece eci ecm eco ed- eda edb edc edd ede edi edm edo eea eeb eec eed eee eem eeo eia eib eic eid eie eii eim eio em- ema emb emc emd eme emi emm emo eo- eoa eob eoc eod eoe eoi eom eoo i-d ia- iaa iab iac iad iae iai iam iao iba ibb ibc ibd ibe ibi ibm ibo ica icb icc icd ice ici icm ico ida idb idc idd ide idi idm ido ie- iea iec ied iee iei iem iia iib iic iid iie iii iim iio im- ima imb imc imd ime imi imm imo io- ioa iob ioc iod ioe ioi iom ioo m-o maa mab mac mad mae mai mam mao mba mbb mbc mbd mbe mbi mbm mbo mc- mca mcb mcc mcd mce mci mcm mco mda mdb mdc mdd mde mdi mdm mdo mea meb mec med mee mei mem meo mi- mia mib mic mid mie mii mim mio mma mmb mmc mmd mme mmi mmm mmo moa mob moc mod moe moi mom moo o-i oaa oab oac oad oae oai oam oao ob- oba obb obc obd obe obi obm obo oc- oca ocb occ ocd oci ocm oco oda odb odc odd ode odi odm odo oea oeb oec oed oee oei oem oeo oia oib oic oid oie oii oim oio om- oma omb omc omd ome omi omm omo oo- ooa oob ooc ood ooi oom ooo