b-p bbb bbe bbi bbm bbn bbo bbp bbs be- beb bee bei bem ben beo bep bes bi- bib bie bii bim bin bio bip bis bmb bme bmi bmm bmn bmo bmp bms bnb bne bni bnn bno bnp bns bob boe boi bom bon boo bop bos bpb bpe bpi bpm bpn bpo bpp bps bsb bse bsi bsm bsn bso bsp bss ebb ebe ebi ebm ebn ebo ebp ebs eeb eee eem een eeo eep ees eib eie eii eim ein eio eip eis em- emb eme emi emm emn emo emp ems en- enb ene eni enm enn eno enp ens eo- eob eoe eoi eom eon eoo eop eos ep- epb epe epi epm epn epo epp eps es- esb ese esi esm esn eso esp ess ibb ibe ibi ibm ibn ibo ibp ibs ie- iee iei iem ien iep ies iib iie iii iim iin iio iip iis im- imb ime imi imm imn imo imp ims in- inb ine ini inm inn ino inp ins io- iob ioe ioi iom ion ioo iop ios ipb ipe ipi ipm ipn ipo ipp ips is- isb ise isi ism isn iso isp iss m-o mbb mbe mbi mbm mbo mbp mbs meb mee mei mem men meo mep mes mi- mib mie mii mim min mio mip mis mmb mme mmi mmm mmn mmo mmp mms mnb mne mni mnm mnn mno mnp mns mob moe moi mom mon moo mop mos mpb mpe mpi mpm mpn mpo mpp mps msb mse msi msm msn mso msp mss n-i nbb nbe nbi nbm nbn nbo nbp nbs ne- neb nee nei nem nen neo nep nes nib nie nii nim nin nio nip nis nmb nme nmi nmm nmn nmo nmp nms nnb nne nni nnm nnn nno nnp nns no- nob noe noi nom non noo nop nos npb npe npi npm npn npo npp nps nsb nse nsi nsm nsn nso nsp nss o-i ob- obb obe obi obm obn obo obp obs oeb oee oei oem oen oeo oep oes oib oie oii oim oin oio oip ois om- omb ome omi omm omn omo omp oms on- onb one oni onn ono onp ons oo- oob ooi oom oon ooo oop oos op- opb ope opi opm opn opo opp ops os- osb ose osi osm osn oso osp oss p-p pbb pbe pbi pbm pbn pbo pbp pbs peb pee pei pem pen peo pep pes pib pie pii pim pin pio pip pis pmb pme pmi pmm pmn pmo pmp pms pn- pnb pne pni pnm pnn pno pnp pns pob poe poi pom pon poo pop pos ppb ppe ppi ppm ppn ppo ppp pps ps- psb pse psi psm psn pso psp pss sbb sbe sbi sbm sbn sbo sbp sbs se- seb see sei sem sen seo sep ses sib sie sii sim sin sio sip sis smb sme smi smm smn smo smp sms snb sne sni snm snn sno snp sns sob soe soi som son soo sop sos spb spe spi spm spn spo spp sps ss- ssb sse ssi ssm ssn sso ssp sss