bbbb bbdd bbeb bcbc bccc bcde bcec bcuc bdbc bddc bebb bebe beck becu bede bedu beeb beed beek beke beuk bubb bube bubu bucc buce buck bucu budb budd bude budu bueu buke bukk buku c-cd cbbc cbcc cbce cbcu cbdb cbdc cbec cbee ccbc cccb cccc cccu ccdc cced ccee ccuc cd-e cddb cdec cebu cec- cece cedd cede cedu ceeb ceec ceke ckbc ckbe ckck ckdu cub- cubb cube cucc cuce cuck cude cued cuek cuk- cuke dbcc dcbc dccb dccc dccu dcdb dddd ddub debe debu dec- decc decd dece deck dedd dede dedu deeb deed deek dek- deke deue deuk dkdc dub- dubb dubc dube dubu duce duck dudd dude dudu duke duku ebbc ebcc ebed ecbc ecbe eccb eccc ecce ecdc eced eddc edde ede- educ eede eedu eeee eeke ekeb eked ekek eubc eucd eude kbbb kbbc kbbd kbbe kbbk kbbu kbcb kbce kbck kbcu kbdb kbde kbeb kbec kbed kbee kbek kbkb kbkk kbub kbuc kbud kbue kbuk kbuu kcbc kcbd kcbk kcbu kccb kccc kccd kcck kccu kcdc kcdd kcdu kceb kcec kced kcee kceu kckc kckk kcub kcue kcuk kdbb kdcc kdcd kdce kddb kddc kddd kddk kdeb kdec kdkb kdkd kdkk kdub kduc kebb kebc kebe kebu keck kedb kedc kedd kede keed keek kekb kekc keke keku kkbb kkbd kkbe kkcb kkcd kkck kkdc kkdd kked kkkk kkuu kubb kubc kubd kube kubu kucb kucc kucd kuce kudd kude kudu kued kuek kueu kuke kukk kuku kuub kuuk kuuu ubbe ubek ubud ucbc ucdc ucdd udbc uduk ukcc ukek ukeu uuuu