ffff fftf fofo fomo fomt fomy foof foom foot fotm foto fott foty foyt ftfy mftf mmff mmmm mmyy moff mofo momo momy moot motm moto mott moty moyo mtff mtom mymy myo- myot myto off- offo offy ofmy omo- omoo omyt ooff oofy oooo ooty oto- otof otoo otoy otto t-mo tfot tmtt to-y toff tofo toft tomm tomo tomt tomy toof toom toot totm toto tott toty toym toyo toyt ttff ttoy tttt tyff tyft tyto tytt tyty yoff yomo yoof yoot yott yoyo yyff yyyy