b-u bbb bbg bbh bbi bbr bbu bgb bgg bgh bgi bgr bgu bhb bhg bhh bhi bhr bhu bi- bib big bih bii bir biu brb brg brh bri brr bru bub bug buh bui bur buu gbg gbh gbi gbr gbu ggb ggg ggh ggi ggr ggu ghb ghg ghh ghi ghr gib gig gih gii gir giu grb grg grh gri grr gru gu- gub gug gui gur guu h-i hbb hbg hbh hbi hbr hbu hgb hgg hgh hgi hgr hgu hhb hhg hhh hhi hhr hhu hib hig hih hii hir hiu hr- hrb hrg hrh hri hrr hru hub hug huh hui hur huu ibb ibg ibh ibi ibr ibu igb igg igh igi igr igu ihb ihg ihh ihi ihr ihu iib iih iii iir iiu ir- irb irg iri irr iru iu- iub iug iui iur rbb rbg rbh rbi rbr rbu rgb rgg rgh rgi rgr rh- rhb rhg rhh rhi rhr rhu rib rig rih rii rir rrb rrg rrh rri rrr rru rub rug ruh rui rur ruu ubb ubg ubh ubi ubr ubu ugb ugg ugh ugi ugr ugu uhb uhh uhi uhr uhu uib uig uii uir uiu ur- urb urg uri urr uru uug uur uuu