a-a a-b a-i aaa aab aaf aai aam aan aas ab- aba abb abf abi abm abn abs af- afa afb aff afi afm afn afs ai- aia aib aif aii aim ain ais ama amb amf ami amm amn ams an- ana anb anf ani anm ann ans as- asa asb asf asi asm asn ass baa bab baf bai bam ban bas bba bbb bbf bbi bbm bbn bbs bfa bfb bff bfi bfm bfn bfs bi- bia bib bif bii bim bin bis bma bmb bmf bmi bmm bmn bms bna bnb bnf bni bnn bns bsa bsb bsf bsi bsm bsn bss faa fab faf fai fam fan fas fba fbb fbf fbi fbm fbn fbs ffa fff ffi ffm ffn ffs fia fib fif fii fim fin fis fma fmb fmf fmi fmm fmn fms fna fnb fnf fni fnm fnn fns fsa fsb fsf fsi fsm fsn fss i-f ia- iaa iab iaf iai iam ian ias iba ibb ibf ibi ibm ibn ibs ifa ifb iff ifi ifm ifn ifs iia iib iif iii iim iin iis im- ima imb imf imi imm imn ims in- ina inb inf ini inm inn ins is- isa isb isf isi ism isn iss m-f maa mab maf mai mam man mas mba mbb mbf mbi mbm mbs mfa mfb mff mfi mfm mfn mfs mi- mia mib mif mii mim min mis mma mmb mmf mmi mmm mmn mms mna mnb mnf mni mnm mnn mns msa msb msf msi msm msn mss n-i naa nab naf nai nam nan nas nba nbb nbf nbi nbm nbn nbs nfa nfb nff nfi nfn nfs nia nib nif nii nim nin nis nma nmb nmi nmm nmn nms nna nnb nnf nni nnm nnn nns nsa nsb nsf nsi nsm nsn nss saa sab saf sai sam san sas sba sbb sbf sbi sbm sbn sbs sfa sfb sff sfi sfm sfn sfs sia sib sif sii sim sin sis sma smb smf smi smm smn sms sna snb snf sni snm snn sns ss- ssa ssb ssf ssi ssm ssn sss