a-ak aaaa aaac aaad aaca aacc aacd aack aada aadc aaka acaa acac acad acag acca accc accd acda acdc acga ackd adaa adac adad adag adak adcc adda addc addd agac agad agag agca agcc agda agga akaa akca akka c-cd caaa caac cac- caca cacc cack cada cadc cadd caga cagg caka ccaa ccac ccad ccag ccca cccc ccdc ccga ccgc cdaa cdac cdad cdda cgac cgcc cgcg ckac ckck ckga daad daag daca dada daga dagg daka dcca dccc dddd dgac dgca dgka dgkd dgkg dkdc gack gada gadd gadk gaga gagg gc-c gcaa gccc gcda gdca gggg kaaa kaag kaak kacc kacd kad- kada kadd kag- kaga kagc kagg kaka kakc kakk kcaa kcac kcad kcca kccc kccd kcck kcda kcdc kcdd kcgc kckc kckk kdaa kdac kdad kdag kdak kdca kdcc kdcd kddc kddd kddg kddk kdka kdkd kdkk kgac kgak kgcc kgcd kgdc kgdd kgga kggg kkaa kkac kkag kkcd kkck kkda kkdc kkdd kkdg kkkk