bbbee be-er beber beebe beepi beeri beibi beier beipu beire beppe beppu berbe berei berie beriu berre berri berru beuer beure bibbe biber bibie bibri biebe biere bieri bieup bipib birie birur biure brebu breer brere breu- bribe brier brrrr bruer bruiu bruri bubbe buber buipe buire burie burri burru ebber ebbie ebibe ebure eeeee eepee eerie eipri eirie eppie epure erbbe erber erere erier eubie eurre ibbur ieiri iepe ieper ierei iiiee iiiii iperu ippee ippei ipubi irrep irupi iurie p-rep pebi- pebie pebre peebu peere peeri peire pepee peppe peppi pepup perer peri- perie perre perri perur peure piere pieri pieup piibe piiri piper pippi pipri pirie pirre pirri pirui piuri piuru preie prier puber pueri puppe pupri puree purer purie purre puuri re-up rebbe reber reepe reere reppe repub rere- reree rerip rerir reuer reuir ribbi riber ribie ribup riper rippe ripup ririe rirpu riuer rripe rubbi rubee ruber rubie rubup ruere ruiru rupee ruper rupie uber- ubirr upier upper uppie uribe urubu urupe ururi uuuuu