-er -ic a-a a-b a-c a-i aaa aab aac aae aai aam aar ab- aba abb abc abe abi abm abr ac- aca acb acc ace aci acm acr aea aeb aec aee aei aem aer ai- aia aib aic aie aii aim air ama amb amc ame ami amm amr ar- ara arb arc are ari arm arr baa bab bac bae bai bam bar bba bbb bbc bbe bbi bbm bbr bca bcb bcc bce bci bcm bcr be- bea beb bec bee bei bem ber bi- bia bib bic bie bii bim bir bma bmb bmc bme bmi bmm bmr bra brb bre bri brm brr c-- caa cab cac cae cai cam car cba cbb cbc cbe cbi cbm cbr cca ccb ccc cce cci ccm ccr ce- cea ceb cec cee cei cem cer ci- cia cib cic cie cii cim cir cma cmb cmc cme cmi cmm cmr cra crb crc cre cri crm crr eaa eab eac eae eai eam ear eba ebb ebc ebe ebi ebm ebr ec- eca ecb ecc ece eci ecm ecr eea eeb eec eee eem eer eia eib eic eie eii eim eir em- ema emb emc eme emi emm emr era erb erc ere eri erm err ia- iaa iab iac iae iai iam iar iba ibb ibc ibe ibi ibm ibr ica icb icc ice ici icm icr ie- iea iec iee iei iem ier iia iib iic iie iii iim iir im- ima imb imc ime imi imm ir- ira irb irc ire iri irm irr m-r maa mab mac mae mai mam mar mba mbb mbc mbe mbi mbm mbr mc- mca mcb mcc mce mci mcm mcr mea meb mec mee mei mem mer mi- mia mib mic mie mii mim mir mma mmb mmc mme mmi mmm mmr mra mrb mrc mre mri mrm mrr ra- raa rab rac rae rai ram rar rba rbb rbc rbe rbi rbm rbr rca rcb rcc rce rci rcm rcr re- rea reb rec ree rei rem rer ria rib ric rie rii rim rir rma rmb rmc rme rmi rmm rmr rra rrb rrc rri rrm rrr