bbbb bbdd bbeb bbfc bcbc bccc bcde bcec bcfc bdbc bddc bebb bebe bede beeb beed beef befe beff c-cd cbbc cbcc cbce cbdb cbdc cbec cbee cbef cbfb cbfc ccbc cccb cccc cccf ccdc ccdf cced ccee ccfc ccfd ccff cd-e cdbf cddb cdec cdef cdfe cec- cece cedd cede ceeb ceec cef- cefc cfbc cfcb cfcf cffb dbcc dbfc dcbc dccb dccc dcdb dcfc dddd debe dec- decc decd dece dedd dede deeb deed deef defe deff dfcc ebbc ebcc ebed ebfc ecbc ecbe eccb eccc ecce ecdc ecdf eced ecef ecfc eddc edde ede- eede eeee eefe fccf fece fede feeb feed fefc fefe feff ffcc ffee ffff