a-a a-b a-i aaa aab aae aai aam aan aas ab- aba abb abe abi abm abn abs aea aeb aee aei aem aen aes ai- aia aib aie aii aim ain ais ama amb ame ami amm amn ams an- ana anb ane ani anm ann ans as- asa asb ase asi asm asn ass baa bab bae bai bam ban bas bba bbb bbe bbi bbm bbn bbs be- bea beb bee bei bem ben bes bi- bia bib bie bii bim bin bis bma bmb bme bmi bmm bmn bms bna bnb bne bni bnn bns bsa bsb bse bsi bsm bsn bss eaa eab eae eai eam ean eas eba ebb ebe ebi ebm ebn ebs eea eeb eee eem een ees eia eib eie eii eim ein eis em- ema emb eme emi emm emn ems en- ena enb ene eni enm enn ens es- esa esb ese esi esm esn ess ia- iaa iab iae iai iam ian ias iba ibb ibe ibi ibm ibn ibs ie- iea iee iei iem ien ies iia iib iie iii iim iin iis im- ima imb ime imi imm imn ims in- ina inb ine ini inm inn ins is- isa isb ise isi ism isn iss maa mab mae mai mam man mas mba mbb mbe mbi mbm mbs mea meb mee mei mem men mes mi- mia mib mie mii mim min mis mma mmb mme mmi mmm mmn mms mna mnb mne mni mnm mnn mns msa msb mse msi msm msn mss n-i naa nab nae nai nam nan nas nba nbb nbe nbi nbm nbn nbs ne- nea neb nee nei nem nen nes nia nib nie nii nim nin nis nma nmb nme nmi nmm nmn nms nna nnb nne nni nnm nnn nns nsa nsb nse nsi nsm nsn nss saa sab sae sai sam san sas sba sbb sbe sbi sbm sbn sbs se- sea seb see sei sem sen ses sia sib sie sii sim sin sis sma smb sme smi smm smn sms sna snb sne sni snm snn sns ss- ssa ssb sse ssi ssm ssn sss