fff ffo ffp ffr fft fof foo fop for fot fpo fpp fpr fpt frf fro frp frr frt ftf fto ftp ftr ftt of- off ofo ofp ofr oft oo- oof ooo oop oor oot op- opf opo opp opr opt or- orf oro orp orr ort ot- otf oto otp otr ott p-p pff pfo pfp pfr pft pof poo pop por pot ppf ppo ppp ppr ppt prf pro prp prr prt pt- ptf pto ptp ptr ptt rff rfo rfp rfr rft rof roo rop ror rot rpf rpo rpp rpr rpt rrf rrp rrr rrt rtf rto rtp rtr rtt tff tfo tfp tfr tft to- tof too top tor tot tpf tpo tpp tpr tpt trf tro trp trr trt ttf tto ttp ttr ttt

ffff ffrr fftf fofo foof foot fopp for- foro forr fort foto fotp fott fprf frop frot ftop off- offo offr ofor oftp ooff oooo oort ootp opo- opor oppo opto orff oro- orof oror orot orro orto otfp oto- otof otoo otor otpp otro otto pfff pffr pfft poff poof poop poor poot pop- popo popp popt poro porr port potf poto pott pppo pppp pprf pptt pro- prof proo prop prot prtp prtr ptop ptrf roff rofo roof roop roor root ropo roro rort roto rotr rott rpof rrrr rttp tfot tfpt tftp toff tofo toft toof toor toot top- topf topo topp topt torf toro torp torr tort toto totr tott tppp tppr tptp tptr trfr troo trop trot trpp trtr ttff ttop tttt

forro forto fprot froop froot ftrtt offof offto ofoto ofpop ooooo opto- optot optto orfor ortoo ototo otpor pforp po-po poopo poort popop poppo poro- porro porto potof potoo potop potor potro potto proff proft proof proor proot prop- propp propr propt prot- proto prtor ptprf ptpro ptprr ptprt ro-ro rofor rooft roto- rotor rotot rotto rprop rptor t-pop t-top toffo tofop tofor topo- topof topor topot toppo topto torpo torro torto toto- totoo totop tprot troff troft troop trop- tropo trott ttttt

f-prot foofoo forrot ftroop ofpoor oftfor oofotr oooooo oporto optfor optoro ottoor poopoo popfor popoff popopo poporo poppop poptop pottop pppppp profor proto- rootof to-fro tootoo topoff toppop tororo torpor tortor totopo totoro totrot tropo- troppo trotro

foo-foo footrot forroot off-off ofproof ottrott poo-poo pop-off pop-top potoroo profoto proport rooftop rootfor rootrot too-too top-off topfort tototoo tro-tro trotoff

foptroop poorpoor poroporo roof-top rotproof toottoot top-root torotoro

poto-poto proprotor rot-proof

footforfoot potoooooooo proof-proof

toptoptoptop