bbbb bbch bblb bcbc bccc bccl bcnu bcuc bhcc bhuu blcu blub bubb bubu bucc buch bucu buhl bulb bull bulu bunb bunn bunu cbbc cbcc cbcl cbcn cbcu cbhl cblb cblc cbln ccbc ccbn cccb cccc cccl cccu cchl cclc ccnb ccnc ccnu ccuc chch chlc chln chnb chnc chnl chub chul chun club cluh clun cnbc cnbl cub- cubb cucc cucn culb culc cull hcbc hccb hccc hcch hhcl hhhh hlul hubb hubl huch hucu huhn huhu hulc hull hulu hunc hunh huub lbcc lcbc lccc lchc lhhh lhun llcc lllc llll luch luhu lull lulu lunn nbbc nbcc ncbc nccc nccn nccu nchc nclc ncln ncnc nhcc nhhl nhnn nlcc nnnn nubc nubl nuch nucu null nunc nunn ucbc uhcl uhuh ulbc ulcc ulch ulul uncc unch uncl uulu uuuu