a-a a-b a-c aaa aab aac aae aam aap aas ab- aba abb abc abe abm abp abs ac- aca acb acc ace acm acp acs aea aeb aec aee aem aep aes ama amb amc ame amm amp ams ap- apa apb apc ape apm app aps as- asa asb asc ase asm asp ass b-p baa bab bac bae bam bap bas bba bbb bbc bbe bbm bbp bbs bca bcb bcc bce bcm bcp bcs be- bea beb bec bee bem bep bes bma bmb bmc bme bmm bmp bms bpa bpb bpc bpe bpm bpp bps bsa bsb bsc bse bsm bsp bss c-- caa cab cac cae cam cap cas cba cbb cbc cbe cbm cbp cbs cca ccb ccc cce ccm ccp ccs ce- cea ceb cec cee cem cep ces cma cmb cmc cme cmm cmp cms cpa cpb cpc cpe cpm cpp cps csa csb csc cse csm csp css eaa eab eac eae eam eap eas eba ebb ebc ebe ebm ebp ebs ec- eca ecb ecc ece ecm ecs eea eeb eec eee eem eep ees em- ema emb emc eme emm emp ems ep- epa epb epc epe epm epp eps es- esa esb esc ese esm esp ess maa mab mac mae mam map mas mba mbb mbc mbe mbm mbp mbs mc- mca mcb mcc mce mcm mcp mcs mea meb mec mee mem mep mes mma mmb mmc mme mmm mmp mms mpa mpb mpc mpe mpm mpp mps msa msb msc mse msm msp mss p-p paa pab pac pae pam pap pas pba pbb pbc pbe pbm pbp pbs pca pcb pcc pce pcm pcp pcs pea peb pec pee pem pep pes pma pmb pmc pme pmm pmp pms ppa ppb ppc ppe ppm ppp pps ps- psa psb psc pse psm psp pss saa sab sac sae sam sap sas sba sbb sbc sbe sbm sbp sbs sca scb scc sce scm scp scs se- sea seb sec see sem sep ses sma smb smc sme smm smp sms spa spb spc spe spm spp sps ss- ssa ssb ssc sse ssm ssp sss