-er -ic a-a a-b a-c a-i aaa aab aac aad aae aai aam aar ab- aba abb abc abd abe abi abm abr ac- aca acb acc acd ace aci acm acr ad- ada adb adc add ade adi adm adr aea aeb aec aed aee aei aem aer ai- aia aib aic aid aie aii aim air ama amb amc amd ame ami amm amr ar- ara arb arc ard are ari arm arr baa bab bac bad bae bai bam bar bba bbb bbc bbd bbe bbi bbm bbr bca bcb bcc bcd bce bci bcm bcr bda bdb bdc bdd bde bdi bdm bdr be- bea beb bec bed bee bei bem ber bi- bia bib bic bid bie bii bim bir bma bmb bmc bmd bme bmi bmm bmr bra brb brd bre bri brm brr c-- caa cab cac cad cae cai cam car cba cbb cbc cbd cbe cbi cbm cbr cca ccb ccc ccd cce cci ccm ccr cda cdb cdc cdd cde cdi cdm cdr ce- cea ceb cec ced cee cei cem cer ci- cia cib cic cid cie cii cim cir cma cmb cmc cmd cme cmi cmm cmr cra crb crc crd cre cri crm crr daa dab dac dad dae dai dam dar dba dbb dbc dbd dbe dbi dbm dbr dca dcb dcc dcd dce dci dcm dcr dda ddb ddc ddd dde ddi ddm ddr de- dea deb dec ded dee dei dem der di- dia dib dic did die dii dim dir dma dmb dmc dmd dme dmi dmm dmr dra drb drc drd dre dri drm drr eaa eab eac ead eae eai eam ear eba ebb ebc ebd ebe ebi ebm ebr ec- eca ecb ecc ecd ece eci ecm ecr ed- eda edb edc edd ede edi edm edr eea eeb eec eed eee eem eer eia eib eic eid eie eii eim eir em- ema emb emc emd eme emi emm emr era erb erc erd ere eri erm err i-d ia- iaa iab iac iad iae iai iam iar iba ibb ibc ibd ibe ibi ibm ibr ica icb icc icd ice ici icm icr ida idb idc idd ide idi idm idr ie- iea iec ied iee iei iem ier iia iib iic iid iie iii iim iir im- ima imb imc imd ime imi imm ir- ira irb irc ird ire iri irm irr m-r maa mab mac mad mae mai mam mar mba mbb mbc mbd mbe mbi mbm mbr mc- mca mcb mcc mcd mce mci mcm mcr mda mdb mdc mdd mde mdi mdm mdr mea meb mec med mee mei mem mer mi- mia mib mic mid mie mii mim mir mma mmb mmc mmd mme mmi mmm mmr mra mrb mrc mrd mre mri mrm mrr ra- raa rab rac rad rae rai ram rar rba rbb rbc rbd rbe rbi rbm rbr rca rcb rcc rcd rce rci rcm rcr rda rdb rdc rdd rde rdi rdm rdr re- rea reb rec red ree rei rem rer ria rib ric rid rie rii rim rir rma rmb rmc rmd rme rmi rmm rmr rra rrb rrc rrd rri rrm rrr