b-u bbb bbg bbi bbm bbu bgb bgg bgi bgm bgu bi- bib big bii bim biu bmb bmg bmi bmm bmu bub bug bui bum buu gbg gbi gbm gbu ggb ggg ggi ggm ggu gib gig gii gim giu gmb gmg gmi gmm gu- gub gug gui gum guu ibb ibg ibi ibm ibu igb igg igi igm igu iib iii iim iiu im- imb img imi imm imu iu- iub iug iui ium mbb mbg mbi mbm mbu mgb mgi mgm mgu mi- mib mig mii mim miu mmb mmg mmi mmm mmu mub mug mui mum muu ubb ubg ubi ubu ugb ugg ugi ugm ugu uib uig uii uim uiu um- umb umg umi umm umu uug uum uuu