a-do aaaa aaac aaad aaca aacc aacd aaco aact aada aadc aadt aaoo aata aatc aatt ac-t acaa acac acad acat acca accc accd acco acct acda acdc acdt acoa acod acot acta actc acto actt adaa adac adad adao adat adcc adda addc addd addo adoc adod adoo adot adta aoca aotc aotd at-t ataa atac atad atat atca atcc atco atdt atoc atod atot atta atto c-cd caaa caac caat cac- caca cacc caco cada cadc cadd cado caod cat- cata catc catd cato catt ccaa ccac ccad ccat ccca cccc ccdc ccoc ccod cctc cctt cdaa cdac cdad cdda cdot coad coat coca coco coct coda codd cood coot cota cotc coto cott ctca ctot ctta daad daca dact dada dado data dato datt dcca dccc dcct dctc dddd ddoc ddot doat doca doco doct dod- doda dodd dodo dood doot dota dotd doto dott dtaa dtac dtcc dtot ocac ocad ocat occa occc occt oct- octa octo odac odda oddd odoo odot ooaa ooda oooo otac otcd oto- otoo otta otto taa- taat taca tacc taco tact tada tado taoa tata tato tatt tcad tcca tccc tcdd tctc tdac toad toat toca toco toda todd todo todt tooa tood toot tota totc totd toto tott tttt