a-do aaaa aaac aaad aaaf aaca aacc aacd aacf aaco aact aada aadc aadt aafa aafc aafd aaff aaoo aata aatc aatf aatt ac-t acaa acac acad acat acca accc accd accf acco acct acda acdc acdf acdt acfc acfd acft acoa acod acot acta actc actf acto actt adaa adac adad adao adat adcc adda addc addd addo adfa adfc adoc adod adoo adot adta afaa afad afao afat afca afcc afdc affa affc affo afft afoa afoo afta aftc aoca aotc aotd aotf at-t ataa atac atad atat atca atcc atcf atco atdt atfc atoc atod atof atot atta atto c-cd caaa caac caaf caat cac- caca cacc caco cada cadc cadd cado cafa cafc caff caod cat- cata catc catd catf cato catt ccaa ccac ccad ccaf ccat ccca cccc cccf ccdc ccdf ccfa ccfc ccfd ccff ccoc ccod cctc cctt cdaa cdac cdad cdda cdfa cdot cfaa cfac cfao cfca cfcf cfco cfda cfoa cfta cftc coad coat coca coco coct coda codd cofc coff coft cood coof coot cota cotc coto cott ctca ctcf ctfc ctfo ctot ctta daad daca dact dada dado dafa dafc daff dafo daft data dato datt dcca dccc dcct dcfc dctc dddd ddoc ddot dfaf dfcc dfco dfdt dffa doat doca doco doct dod- doda dodd dodo doff dood doof doot dota dotd doto dott dtaa dtac dtcc dtfc dtot faaa faac faad faca facc fact fada fadd fado fafa fafc faff fafo fata fatc fatf fato fatt fcat fcca fccf fcda fcot fcto fdca fdoa fdoc fdot fdtc ffcc ffff fftf foad foaf foca foco foda fofo food foof foot fota foto fott ft-c ftcd ftfc oafc oafo ocac ocad ocat occa occc occt ocfa oct- octa octo odac odda oddd odoo odot off- offa offc offo ofta ooaa ooda ooff oooo otac otcd otfc oto- otof otoo otta otto taa- taaf taat taca tacc taco tact tada tado tafa tafc taff tafo taft taoa tata tato tatt tcad tcca tccc tcdd tcfc tctc tdac tdff tfca tfdc tfot tftc toad toat toca toco toda todd todo todt tofa toff tofo toft tooa tood toof toot tota totc totd toto tott ttfa ttfc ttff tttt