a-a a-b a-i aaa aab aae aai aam aan aap aas ab- aba abb abe abi abm abn abp abs aea aeb aee aei aem aen aep aes ai- aia aib aie aii aim ain aip ais ama amb ame ami amm amn amp ams an- ana anb ane ani anm ann anp ans ap- apa apb ape api apm apn app aps as- asa asb ase asi asm asn asp ass b-p baa bab bae bai bam ban bap bas bba bbb bbe bbi bbm bbn bbp bbs be- bea beb bee bei bem ben bep bes bi- bia bib bie bii bim bin bip bis bma bmb bme bmi bmm bmn bmp bms bna bnb bne bni bnn bnp bns bpa bpb bpe bpi bpm bpn bpp bps bsa bsb bse bsi bsm bsn bsp bss eaa eab eae eai eam ean eap eas eba ebb ebe ebi ebm ebn ebp ebs eea eeb eee eem een eep ees eia eib eie eii eim ein eip eis em- ema emb eme emi emm emn emp ems en- ena enb ene eni enm enn enp ens ep- epa epb epe epi epm epn epp eps es- esa esb ese esi esm esn esp ess ia- iaa iab iae iai iam ian iap ias iba ibb ibe ibi ibm ibn ibp ibs ie- iea iee iei iem ien iep ies iia iib iie iii iim iin iip iis im- ima imb ime imi imm imn imp ims in- ina inb ine ini inm inn inp ins ipa ipb ipe ipi ipm ipn ipp ips is- isa isb ise isi ism isn isp iss maa mab mae mai mam man map mas mba mbb mbe mbi mbm mbp mbs mea meb mee mei mem men mep mes mi- mia mib mie mii mim min mip mis mma mmb mme mmi mmm mmn mmp mms mna mnb mne mni mnm mnn mnp mns mpa mpb mpe mpi mpm mpn mpp mps msa msb mse msi msm msn msp mss n-i naa nab nae nai nam nan nap nas nba nbb nbe nbi nbm nbn nbp nbs ne- nea neb nee nei nem nen nep nes nia nib nie nii nim nin nip nis nma nmb nme nmi nmm nmn nmp nms nna nnb nne nni nnm nnn nnp nns npa npb npe npi npm npn npp nps nsa nsb nse nsi nsm nsn nsp nss p-p paa pab pae pai pam pan pap pas pba pbb pbe pbi pbm pbn pbp pbs pea peb pee pei pem pen pep pes pia pib pie pii pim pin pip pis pma pmb pme pmi pmm pmn pmp pms pn- pna pnb pne pni pnm pnn pnp pns ppa ppb ppe ppi ppm ppn ppp pps ps- psa psb pse psi psm psn psp pss saa sab sae sai sam san sap sas sba sbb sbe sbi sbm sbn sbp sbs se- sea seb see sei sem sen sep ses sia sib sie sii sim sin sip sis sma smb sme smi smm smn smp sms sna snb sne sni snm snn snp sns spa spb spe spi spm spn spp sps ss- ssa ssb sse ssi ssm ssn ssp sss