fff ffg ffo ffp fft fgf fgg fgp fgt fof fog foo fop fot fpg fpo fpp fpt ftf ftg fto ftp ftt g-p gff gfo gfp gft ggg ggo ggp ggt gof gog goo gop got gpf gpg gpo gpp gpt gtf gtg gto gtp gtt of- off ofg ofo ofp oft ogf ogg ogo ogp ogt oo- oof oog ooo oop oot op- opf opg opo opp opt ot- otf otg oto otp ott p-p pff pfg pfo pfp pft pgf pgg pgo pgp pgt pof pog poo pop pot ppf ppg ppo ppp ppt pt- ptf ptg pto ptp ptt tff tfg tfo tfp tft tgf tgg tgo tgp tgt to- tof tog too top tot tpf tpg tpo tpp tpt ttf ttg tto ttp ttt