-er -ic a-a a-b a-c a-i aaa aab aac aae aai aam aan aap aar ab- aba abb abc abe abi abm abn abp abr ac- aca acb acc ace aci acm acn acp acr aea aeb aec aee aei aem aen aep aer ai- aia aib aic aie aii aim ain aip air ama amb amc ame ami amm amn amp amr an- ana anb anc ane ani anm ann anp anr ap- apa apb apc ape api apm apn app apr ar- ara arb arc are ari arm arn arp arr b-p baa bab bac bae bai bam ban bap bar bba bbb bbc bbe bbi bbm bbn bbp bbr bca bcb bcc bce bci bcm bcn bcp bcr be- bea beb bec bee bei bem ben bep ber bi- bia bib bic bie bii bim bin bip bir bma bmb bmc bme bmi bmm bmn bmp bmr bna bnb bnc bne bni bnn bnp bnr bpa bpb bpc bpe bpi bpm bpn bpp bpr bra brb bre bri brm brn brp brr c-- caa cab cac cae cai cam can cap car cba cbb cbc cbe cbi cbm cbn cbp cbr cca ccb ccc cce cci ccm ccn ccp ccr ce- cea ceb cec cee cei cem cen cep cer ci- cia cib cic cie cii cim cin cip cir cma cmb cmc cme cmi cmm cmn cmp cmr cn- cna cnb cnc cne cni cnm cnn cnp cnr cpa cpb cpc cpe cpi cpm cpn cpp cpr cra crb crc cre cri crm crn crp crr eaa eab eac eae eai eam ean eap ear eba ebb ebc ebe ebi ebm ebn ebp ebr ec- eca ecb ecc ece eci ecm ecn ecr eea eeb eec eee eem een eep eer eia eib eic eie eii eim ein eip eir em- ema emb emc eme emi emm emn emp emr en- ena enb enc ene eni enm enn enp enr ep- epa epb epc epe epi epm epn epp epr era erb erc ere eri erm ern erp err ia- iaa iab iac iae iai iam ian iap iar iba ibb ibc ibe ibi ibm ibn ibp ibr ica icb icc ice ici icm icn icp icr ie- iea iec iee iei iem ien iep ier iia iib iic iie iii iim iin iip iir im- ima imb imc ime imi imm imn imp in- ina inb inc ine ini inm inn inp inr ipa ipb ipc ipe ipi ipm ipn ipp ipr ir- ira irb irc ire iri irm irn irp irr m-r maa mab mac mae mai mam man map mar mba mbb mbc mbe mbi mbm mbp mbr mc- mca mcb mcc mce mci mcm mcn mcp mcr mea meb mec mee mei mem men mep mer mi- mia mib mic mie mii mim min mip mir mma mmb mmc mme mmi mmm mmn mmp mmr mna mnb mnc mne mni mnm mnn mnp mnr mpa mpb mpc mpe mpi mpm mpn mpp mpr mra mrb mrc mre mri mrm mrn mrp mrr n-i naa nab nac nae nai nam nan nap nar nba nbb nbc nbe nbi nbm nbn nbp nbr nca ncb ncc nce nci ncm ncn ncp ncr ne- nea neb nec nee nei nem nen nep ner nia nib nic nie nii nim nin nip nir nma nmb nmc nme nmi nmm nmn nmp nmr nna nnb nnc nne nni nnm nnn nnp npa npb npc npe npi npm npn npp npr nra nrb nrc nre nri nrm nrn nrp nrr p-p paa pab pac pae pai pam pan pap par pba pbb pbc pbe pbi pbm pbn pbp pbr pca pcb pcc pce pci pcm pcn pcp pcr pea peb pec pee pei pem pen pep per pia pib pic pie pii pim pin pip pir pma pmb pmc pme pmi pmm pmn pmp pmr pn- pna pnb pnc pne pni pnm pnn pnp pnr ppa ppb ppc ppe ppi ppm ppn ppp ppr pra prb prc pre pri prm prn prp prr ra- raa rab rac rae rai ram ran rap rar rba rbb rbc rbe rbi rbm rbn rbp rbr rca rcb rcc rce rci rcm rcn rcp rcr re- rea reb rec ree rei rem ren rep rer ria rib ric rie rii rim rin rip rir rma rmb rmc rme rmi rmm rmn rmp rmr rna rnb rnc rni rnm rnn rnp rnr rpa rpb rpc rpe rpi rpm rpn rpp rpr rra rrb rrc rri rrm rrn rrp rrr