bbbb bbci bbdd bbeb bbet bcbc bccc bcci bcde bcec bcet bcie bcit bctc bdbc bddc bdii bebb bebe bebi beci bede bedi beeb beed beet beic beit betc bete beti bett bibb bibe bibi bicc bice bici bide bidi bieb bied biet bitc bitd bite bitt btcc btdt btec btie bttb c-cd cbbc cbcc cbce cbct cbdb cbdc cbdi cbec cbee cbet cbid cbit cbtc ccbc cccb cccc ccci ccdc ccdi cced ccee ccic ccid ccii cctb cctc cctt cd-e cddb cdec cdic cdii cec- cece ceci cect cedd cede cedi cedt ceeb ceec cet- cete ceti cibc cibe cibi cicc cici cict cidc cide cidi cidt ciee ciid ciii ciit citb cite citi citt ctbi ctec ctic dbcc dbit dbtt dcbc dccb dccc dcci dcct dcdb dcii dctc dddd ddie debe debi debt dec- decc decd dece deci dect dedd dede dedi deeb deed deet deid deie deit dete dibb dibe dice dici dict dide didi dieb died diet diii dite diti ditt dtcc dted ebbc ebcc ebed ebic ebid ebit ecbc ecbe eccb eccc ecce ecci ecct ecdc eced ecib ecit ect- ectc eddc edde eddi ede- edei edie edit eede eeee eetc eete eid- eide eidi eiec eied eiei eitb eitc eiti etbc etcc etec etee etic ette etti i-be ibec ibed ibet ibid ibie ibtb ibtc icbc icbd iccb iccc icci icct icdc icdd icde icec iced icee icet idbe idce idec ided idee idic idid idie iecc ieet ieie iett iicd iide iied iiie iiii iiit iitt itbe itec itet itic itie tbcb tbcc tbcd tbce tbit tccc tcdd tctc tddb tect tedd tede tedi teec teed teet teic teie tete teti tett tibi ticc tice tidc tidd tide tie- tied tiee tiei tiet tiit titc tite titi titt ttbb tttt