bbbb bbci bbeb bbet bcbc bccc bcci bcec bcet bcie bcit bctc bebb bebe bebi beci beck beeb beek beet beic beik beit beke beki betc bete beti bett bibb bibe bibi bicc bice bici bick bieb biet bike bitc bite bitt btcc btec btek btie bttb cbbc cbcc cbce cbct cbec cbee cbet cbit cbtc ccbc cccb cccc ccci ccee ccic ccii cctb cctc cctt cec- cece ceci cect ceeb ceec ceke cet- cete ceti cibc cibe cibi cicc cici cict ciee ciii ciit citb cite citi citt ckbc ckbe ckbi ckck cktb ctbi ctec ctic ebbc ebcc ebic ebit ecbc ecbe eccb eccc ecce ecci ecct ecib ecit ect- ectc eeee eeke eetc eete eick eiec eiei eike eiki eitb eitc eiti ekeb ekek eket ekki etbc etcc etec etee etic etik ette etti i-be ibec ibet ibie ibtb ibtc icbc iccb iccc icci icct icec icee icet icke iecc ieet ieie iett iiie iiii iiit iitt ikee ikki itbe itec itek itet itic itie k-ci kbbb kbbc kbbe kbbi kbbk kbbt kbcb kbce kbci kbck kbct kbeb kbec kbee kbek kbet kbib kbic kbie kbik kbit kbkb kbkk kbtb kbtc kbte kbtk kbtt kcbc kcbi kcbk kccb kccc kcci kcck kcct kceb kcec kcee kcei kcet kcic kcie kcii kcit kckc kckk kctb kctc kcte kcti kebb kebc kebe kebi kebt keck keek keet keib keii keik kekb kekc keke keki ket- ketc kete keti ketk kett kibb kibc kibe kibi kibt kicb kicc kice kick kict kiic kiii kiik kiit kikc kiki kikk kikt kitc kite kiti kitt kkbb kkbe kkbi kkbt kkcb kkci kkck kkct kkic kkik kkit kkkk kktc kktk ktbb ktbc ktbt ktcc ktce ktck ktec ktee ktek ktib ktic ktie ktik ktkb ktkc ktke ktkk ktkt kttc ktti kttk kttt tbcb tbcc tbce tbit tccc tctc teck tect teec teek teet teic teie teke tete teti tett tibi ticc tice tick tie- tiee tiei tiet tiit tike tiki titc tite titi titt ttbb tttt