-up fff ffo ffp fft ffu fof foo fop fot fou fpo fpp fpt fpu ftf fto ftp ftt ftu fuf fuo fup fut fuu of- off ofo ofp oft ofu oo- oof ooo oop oot op- opf opo opp opt ot- otf oto otp ott otu ou- ouf ouo oup out p-p pff pfo pfp pft pfu pof poo pop pot pou ppf ppo ppp ppt ppu pt- ptf pto ptp ptt ptu puf pup put puu tff tfo tfp tft tfu to- tof too top tot tou tpf tpo tpp tpt tpu ttf tto ttp ttt ttu tuf tuo tup tut tuu uff ufo ufp uft ufu uoo uop uot up- upf upo upp upt upu utf uto utp utt utu uut uuu