-hou bbbb bbch bblb bcbc bccc bccl bcuc bhcc bhuu blcu blob bloc bloo blou blub bobb bobo bobu boch boco bocu bohl boho bohu boll bolo bolu boob booc booh bool bouh boul bubb bubo bubu bucc buch buco bucu buhl buho bulb bull bulu buol c-bo cbbc cbcc cbcl cbcu cbhl cblb cblc cbol ccbc cccb cccc cccl cccu cchl cclc ccob ccoc ccuc chch chlc choc choh chol choo chou chub chul clob cloo clou club cluh cobb cobh cobo cobu coch coco cocu coho col- colb coll colo colu coob cooh cool coub coul cub- cubb cucc culb culc cull culo hboc hcbc hccb hccc hcch hhcl hhhh hlul hobo hoch hohl hoho hol- holb holc holh holl holo holu hool hubb hubl hubo huch hucu huhu hulc hull hulu huub lbcc lcbc lccc lchc lhhh llcc lllc llll lloc lloo lob- lobb lobh lobo locc loch loco locu loho lohu loll lolo loob looc lool louh loul louu luch luhu lull lulu luoh obbo oblu obol obuh ocbc occc oclc ocul ohcc ohho ohob ohoh olbo olcc ollo ooho oolo oooh oooo oucc ouch oulu ouu- ubbo ublo uboc ucbc ucho uhcl uhoh uhuh ulbc ulcc ulch ulco ullo ulo- uloc ulul uocc uolc uulu uuoc uuuu