-er -ic a-a a-b a-c a-i aaa aab aac aae aai aam aao aar aax ab- aba abb abc abe abi abm abo abr abx ac- aca acb acc ace aci acm aco acr acx aea aeb aec aee aei aem aeo aer aex ai- aia aib aic aie aii aim aio air aix ama amb amc ame ami amm amo amr amx aoa aob aoc aoe aoi aom aoo aor aox ar- ara arb arc are ari arm aro arr arx ax- axa axe axi axm axo axr axx baa bab bac bae bai bam bao bar bax bba bbb bbc bbe bbi bbm bbo bbr bbx bca bcb bcc bce bci bcm bco bcr bcx be- bea beb bec bee bei bem beo ber bex bi- bia bib bic bie bii bim bio bir bix bma bmb bmc bme bmi bmm bmo bmr bmx boa bob boc boe boi bom boo bor box bra brb bre bri brm bro brr brx bxb bxi bxm bxo bxx c-- caa cab cac cae cai cam cao car cax cba cbb cbc cbe cbi cbm cbo cbr cbx cca ccb ccc cce cci ccm cco ccr ccx ce- cea ceb cec cee cei cem ceo cer cex ci- cia cib cic cie cii cim cio cir cix cma cmb cmc cme cmi cmm cmo cmr cmx co- coa cob coc coe coi com coo cor cox cra crb crc cre cri crm cro crr crx cxc cxi cxo cxr cxx eaa eab eac eae eai eam eao ear eax eba ebb ebc ebe ebi ebm ebo ebr ebx ec- eca ecb ecc ece eci ecm eco ecr ecx eea eeb eec eee eem eeo eer eex eia eib eic eie eii eim eio eir eix em- ema emb emc eme emi emm emo emr emx eo- eoa eob eoc eoe eoi eom eoo eor era erb erc ere eri erm ero err ex- exa exc exe exi exo exr exx ia- iaa iab iac iae iai iam iao iar iba ibb ibc ibe ibi ibm ibo ibr ibx ica icb icc ice ici icm ico icr ie- iea iec iee iei iem ier iex iia iib iic iie iii iim iio iir iix im- ima imb imc ime imi imm imo imx io- ioa iob ioc ioe ioi iom ioo ior ir- ira irb irc ire iri irm iro irr irx ixc ixe ixi m-o m-r maa mab mac mae mai mam mao mar max mba mbb mbc mbe mbi mbm mbo mbr mbx mc- mca mcb mcc mce mci mcm mco mcr mcx mea meb mec mee mei mem meo mer mex mi- mia mib mic mie mii mim mio mir mix mma mmb mmc mme mmi mmm mmo mmr mmx moa mob moc moe moi mom moo mor mox mra mrb mrc mre mri mrm mro mrr mrx mxa mxc mxi mxr o-i oaa oab oac oae oai oam oao oar oax ob- oba obb obc obe obi obm obo obr obx oc- oca ocb occ oci ocm oco ocr ocx oea oeb oec oee oei oem oeo oer oex oia oib oic oie oii oim oio oir om- oma omb omc ome omi omm omo omr omx oo- ooa oob ooc ooi oom ooo oor oox or- ora orb orc ore ori orm oro orr orx ox- oxa oxb oxc oxi oxo oxx ra- raa rab rac rae rai ram rao rar rax rba rbb rbc rbe rbi rbm rbo rbr rbx rca rcb rcc rce rci rcm rco rcr rcx re- rea reb rec ree rei rem reo rer rex ria rib ric rie rii rim rio rir rix rma rmb rmc rme rmi rmm rmo rmr rmx roa rob roc roe roi rom roo ror rox rra rrb rrc rri rrm rrr rxr xaa xac xam xar xbc xbe xbr xbx xcb xci xcr xcx xee xem xer xex xia xic xie xii xio xix xma xmc xmi xmm xmo xmr xmx xoa xoc xoi xom xoo xor xox xrc xrx xxi xxo xxx