a-a a-b aaa aab aae aam aan aap aas ab- aba abb abe abm abn abp abs aea aeb aee aem aen aep aes ama amb ame amm amn amp ams an- ana anb ane anm ann anp ans ap- apa apb ape apm apn app aps as- asa asb ase asm asn asp ass b-p baa bab bae bam ban bap bas bba bbb bbe bbm bbn bbp bbs be- bea beb bee bem ben bep bes bma bmb bme bmm bmn bmp bms bna bnb bne bnn bnp bns bpa bpb bpe bpm bpn bpp bps bsa bsb bse bsm bsn bsp bss eaa eab eae eam ean eap eas eba ebb ebe ebm ebn ebp ebs eea eeb eee eem een eep ees em- ema emb eme emm emn emp ems en- ena enb ene enm enn enp ens ep- epa epb epe epm epn epp eps es- esa esb ese esm esn esp ess maa mab mae mam man map mas mba mbb mbe mbm mbp mbs mea meb mee mem men mep mes mma mmb mme mmm mmn mmp mms mna mnb mne mnm mnn mnp mns mpa mpb mpe mpm mpn mpp mps msa msb mse msm msn msp mss naa nab nae nam nan nap nas nba nbb nbe nbm nbn nbp nbs ne- nea neb nee nem nen nep nes nma nmb nme nmm nmn nmp nms nna nnb nne nnm nnn nnp nns npa npb npe npm npn npp nps nsa nsb nse nsm nsn nsp nss p-p paa pab pae pam pan pap pas pba pbb pbe pbm pbn pbp pbs pea peb pee pem pen pep pes pma pmb pme pmm pmn pmp pms pn- pna pnb pne pnm pnn pnp pns ppa ppb ppe ppm ppn ppp pps ps- psa psb pse psm psn psp pss saa sab sae sam san sap sas sba sbb sbe sbm sbn sbp sbs se- sea seb see sem sen sep ses sma smb sme smm smn smp sms sna snb sne snm snn snp sns spa spb spe spm spn spp sps ss- ssa ssb sse ssm ssn ssp sss