b-u bbb bbi bbm bbo bbu bi- bib bii bim bio biu biz bmb bmi bmm bmo bmu bmz bob boi bom boo bou boz bub bui bum buo buu buz bzo bzu bzz ibb ibi ibm ibo ibu ibz iib iii iim iio iiu im- imb imi imm imo imu imz io- iob ioi iom ioo iou iu- iub iui ium iuz izi izm izo izu izz m-o mbb mbi mbm mbo mbu mi- mib mii mim mio miu miz mmb mmi mmm mmo mmu mmz mob moi mom moo mou moz mub mui mum muu mzb mzi mzm o-i ob- obb obi obm obo obu oib oii oim oio oiu oiz om- omb omi omm omo omu omz oo- oob ooi oom ooo ou- oui oum ouo ozm ozo ozu ozz ubb ubi ubo ubu uib uii uim uio uiu um- umb umi umm umo umu uob uom uoo uum uuu uzb uzi uzo uzu zbb zbm zib zim zio ziz zmb zmm zo- zob zoi zom zoo zou zub zui zum zuz zzz