-er -ic a-a a-b a-c a-i aaa aab aac aae aai aam aan aar ab- aba abb abc abe abi abm abn abr ac- aca acb acc ace aci acm acn acr aea aeb aec aee aei aem aen aer ai- aia aib aic aie aii aim ain air ama amb amc ame ami amm amn amr an- ana anb anc ane ani anm ann anr ar- ara arb arc are ari arm arn arr baa bab bac bae bai bam ban bar bba bbb bbc bbe bbi bbm bbn bbr bca bcb bcc bce bci bcm bcn bcr be- bea beb bec bee bei bem ben ber bi- bia bib bic bie bii bim bin bir bma bmb bmc bme bmi bmm bmn bmr bna bnb bnc bne bni bnn bnr bra brb bre bri brm brn brr c-- caa cab cac cae cai cam can car cba cbb cbc cbe cbi cbm cbn cbr cca ccb ccc cce cci ccm ccn ccr ce- cea ceb cec cee cei cem cen cer ci- cia cib cic cie cii cim cin cir cma cmb cmc cme cmi cmm cmn cmr cn- cna cnb cnc cne cni cnm cnn cnr cra crb crc cre cri crm crn crr eaa eab eac eae eai eam ean ear eba ebb ebc ebe ebi ebm ebn ebr ec- eca ecb ecc ece eci ecm ecn ecr eea eeb eec eee eem een eer eia eib eic eie eii eim ein eir em- ema emb emc eme emi emm emn emr en- ena enb enc ene eni enm enn enr era erb erc ere eri erm ern err ia- iaa iab iac iae iai iam ian iar iba ibb ibc ibe ibi ibm ibn ibr ica icb icc ice ici icm icn icr ie- iea iec iee iei iem ien ier iia iib iic iie iii iim iin iir im- ima imb imc ime imi imm imn in- ina inb inc ine ini inm inn inr ir- ira irb irc ire iri irm irn irr m-r maa mab mac mae mai mam man mar mba mbb mbc mbe mbi mbm mbr mc- mca mcb mcc mce mci mcm mcn mcr mea meb mec mee mei mem men mer mi- mia mib mic mie mii mim min mir mma mmb mmc mme mmi mmm mmn mmr mna mnb mnc mne mni mnm mnn mnr mra mrb mrc mre mri mrm mrn mrr n-i naa nab nac nae nai nam nan nar nba nbb nbc nbe nbi nbm nbn nbr nca ncb ncc nce nci ncm ncn ncr ne- nea neb nec nee nei nem nen ner nia nib nic nie nii nim nin nir nma nmb nmc nme nmi nmm nmn nmr nna nnb nnc nne nni nnm nnn nra nrb nrc nre nri nrm nrn nrr ra- raa rab rac rae rai ram ran rar rba rbb rbc rbe rbi rbm rbn rbr rca rcb rcc rce rci rcm rcn rcr re- rea reb rec ree rei rem ren rer ria rib ric rie rii rim rin rir rma rmb rmc rme rmi rmm rmn rmr rna rnb rnc rni rnm rnn rnr rra rrb rrc rri rrm rrn rrr