b-p bbb bbc bbe bbm bbp bbs bcb bcc bce bcm bcp bcs be- beb bec bee bem bep bes bmb bmc bme bmm bmp bms bpb bpc bpe bpm bpp bps bsb bsc bse bsm bsp bss c-- cbb cbc cbe cbm cbp cbs ccb ccc cce ccm ccp ccs ce- ceb cec cee cem cep ces cmb cmc cme cmm cmp cms cpb cpc cpe cpm cpp cps csb csc cse csm csp css ebb ebc ebe ebm ebp ebs ec- ecb ecc ece ecm ecs eeb eec eee eem eep ees em- emb emc eme emm emp ems ep- epb epc epe epm epp eps es- esb esc ese esm esp ess mbb mbc mbe mbm mbp mbs mc- mcb mcc mce mcm mcp mcs meb mec mee mem mep mes mmb mmc mme mmm mmp mms mpb mpc mpe mpm mpp mps msb msc mse msm msp mss p-p pbb pbc pbe pbm pbp pbs pcb pcc pce pcm pcp pcs peb pec pee pem pep pes pmb pmc pme pmm pmp pms ppb ppc ppe ppm ppp pps ps- psb psc pse psm psp pss sbb sbc sbe sbm sbp sbs scb scc sce scm scp scs se- seb sec see sem sep ses smb smc sme smm smp sms spb spc spe spm spp sps ss- ssb ssc sse ssm ssp sss