fff ffo ffs fft fof foo fos fot fsf fso fss fst ftf fto fts ftt of- off ofo ofs oft oo- oof ooo oos oot os- osf oso oss ost ot- otf oto ots ott sff sfo sfs sft sof soo sos sot ss- ssf sso sss sst stf sto sts stt tff tfo tfs tft to- tof too tos tot tsf tso tss tst ttf tto tts ttt

ffff ffss fftf fofo foof foos foot foso foss fost foto fots fott fsfo fssf ftos off- offo offs ofst ooff oofs oooo ooos oost oots osoo osos osso osts oto- otof otoo otos otso otto otts s-os sfos sfss sfts sofo soft soof soos soot soso soss sost soto sots ssot sssf ssss ssts stof stoo stos stot stsf stss tfot tfss toff tofo toft toof toos toot toso toss tost toto tots tott tsos tssf tsst tsts ttff ttss tttt

fofos foots fotos offof offto ofoto ooooo ososo ossos otoso ototo ottos so-so softs soots soss- sosto sotoo sotos sotto sotts sssss stoff stoos stoot stoss stots stott toffo toffs tofts toost toots tosos toss- tosto toto- totoo totos ttttt

foofoo fosso oooooo ossott soosoo stotts tootoo tossto tottos tsotso

foo-foo off-off sssssss t-stoff too-too tototoo

toottoot