bi-lo bibbo bibio bibri bilbi bilbo bili- billi billo billu bioul bipib bipil birol birou birur bloop bloor blorb blorp blurb blurr bo-bo bobbi bobr bobri bobup boilo boiro boll- bolli bollo bollu booru borbo borio boro- boroo borou borro borul borup boul- bouli boulo bouri brill briou brobo broil broll brolo brool brrrr bruiu brull bruri bulb- bulbi buliu bull- bulli bulou bulul burio burli burol buroo burri burro burru ibbur ibibo ibill iiiii ilio- illui ilobu ilori ilulu ioooi ioooo iorio ipour ipubi irill irobo irori irour irupi iuliu l-pop liboi libor libri libro libru liliu lilli lillo lilou liour lipo- lippi lippo liril lirio lirui liubo liuli liupo lobbo lobi- lobio lobir lobo- lobor loibl loilo lolli lollo lolol loobu lopou loppi lorio lorri lorup louri louro lubur luiro lulli lulul luppi lupul lurio lurup luuri o-r-b oblio oboli obolo oboro oilup ollio ollup ollur olour ooioo ooooo opio- opir oploo opobo oppol oribi orill oriol orlop orobo orolu oropi oruro ouir- oullo ouoro ourol pibor piilu piiri pili- pilio pillb pillo pilo- pilou pilrb pilur pioli pipil pipli pippi pippo pipri pipul pirlo pirol pirou pirri pirro pirui piuri piuro piuru plio- ploop plopi plopp plopu plupp pluri po-po poill poilu poipu polbo poli- polio polip polli pollo pollu polop polur pooli poopo poori popil poplr popoi popop poppi poppo popup poro- poroi porri porro porur poulp prill priob priol prior probo proll prolo proor prop- propl propp propr pubo- puilo pull- pulli pullu pupil puppo pupri purio purli puro- purul puuri ribbi ribo- ribup rillo rioli riolo ripio ripup rirpu ro-ro robbi robbo robo- robop robor robur rollo rorbu roull rprop rubbi rubio rubor rubup ruili ruiru rulli rullo u-pop ubirr ubobo uiro ullur uloop ulpur ululu ulupi uluru upolo upolu uppli uroob uropi urour urubu uruli ururi uuuuu