bbbb bbeb bbet bcbc bccc bcec bcet bctc bcuc bebb bebe beck becu beeb beek beet beke betc bete bett betu beuk btcc btec btek bttb bubb bube bubu bucc buce buck bucu bueu buke bukk buku but- bute butt cbbc cbcc cbce cbct cbcu cbec cbee cbet cbtc ccbc cccb cccc cccu ccee cctb cctc cctt ccuc ccut cebu cec- cece cect ceeb ceec ceke cet- cete ckbc ckbe ckck cktb ctec cub- cubb cube cucc cuce cuck cuek cuk- cuke cut- cutc cute cutt ebbc ebcc ecbc ecbe eccb eccc ecce ecct ect- ectc eeee eeke eetc eete eetu ekeb ekek eket etbc etcc etec etee ette ettu eubc kbbb kbbc kbbe kbbk kbbt kbbu kbcb kbce kbck kbct kbcu kbeb kbec kbee kbek kbet kbkb kbkk kbtb kbtc kbte kbtk kbtt kbub kbuc kbue kbuk kbut kbuu kcbc kcbk kcbu kccb kccc kcck kcct kccu kceb kcec kcee kcet kceu kckc kckk kctb kctc kcte kctu kcub kcue kcuk kebb kebc kebe kebt kebu keck keek keet kekb kekc keke keku ket- ketc kete ketk kett ketu kkbb kkbe kkbt kkcb kkck kkct kkkk kktc kktk kktu kkut kkuu ktbb ktbc ktbt ktbu ktcc ktce ktck ktec ktee ktek ktkb ktkc ktke ktkk ktkt ktku kttc kttk kttt kttu ktub ktuc kubb kubc kube kubu kucb kucc kuce kuek kueu kuke kukk kuku kute kutt kutu kuub kuuk kuuu tbcb tbcc tbce tccc tccu tctc tebu teck tect teec teek teet teke tete tett tetu teuk teut ttbb tttt tubb tube tubu tucc tuck tuet tuke tute tutt tutu ubbe ubek ubet ucbc ucut ukcc ukek ukeu utec uttu uuuu