b-p bbb bbe bbi bbm bbo bbp bbx be- beb bee bei bem beo bep bex bez bi- bib bie bii bim bio bip bix biz bmb bme bmi bmm bmo bmp bmx bmz bob boe boi bom boo bop box boz bpb bpe bpi bpm bpo bpp bpx bxb bxi bxm bxo bxx bze bzo bzp bzz ebb ebe ebi ebm ebo ebp ebx eeb eee eem eeo eep eex eib eie eii eim eio eip eix em- emb eme emi emm emo emp emx eo- eob eoe eoi eom eoo eop ep- epb epe epi epm epo epp epx epz ex- exe exi exo exp exx eze ezo ezz ibb ibe ibi ibm ibo ibp ibx ibz ie- iee iei iem iep iex iib iie iii iim iio iip iix im- imb ime imi imm imo imp imx imz io- iob ioe ioi iom ioo iop ipb ipe ipi ipm ipo ipp ipx ixe ixi ize izi izm izo izz m-o mbb mbe mbi mbm mbo mbp mbx meb mee mei mem meo mep mex mez mi- mib mie mii mim mio mip mix miz mmb mme mmi mmm mmo mmp mmx mmz mob moe moi mom moo mop mox moz mpb mpe mpi mpm mpo mpp mpx mxi mxp mzb mzi mzm mzp mzx o-i ob- obb obe obi obm obo obp obx oeb oee oei oem oeo oep oex oib oie oii oim oio oip oiz om- omb ome omi omm omo omp omx omz oo- oob ooi oom ooo oop oox op- opb ope opi opm opo opp opx ox- oxb oxi oxo oxx oze ozm ozo ozz p-p pbb pbe pbi pbm pbo pbp pbx pbz peb pee pei pem peo pep pex pez pib pie pii pim pio pip pix piz pmb pme pmi pmm pmo pmp pmx pmz pob poe poi pom poo pop pox poz ppb ppe ppi ppm ppo ppp ppx ppz pxe pxm pzm pzp xbe xbx xee xem xep xex xie xii xio xix xmi xmm xmo xmp xmx xoi xom xoo xop xox xpb xpe xpm xpo xpp xxi xxo xxp xxx zbb zbm zeb zee zem zeo zep zez zib zie zim zio zip zix ziz zmb zmm zmp zo- zob zoe zoi zom zoo zox zpe zpi zpm zpo zpp zxx zzx zzz