dddd ddot ddpo dfdt dfrf dftr dod- dodd dodo doff dood doof doop door doot dopo dopp dopr dopt dord dorf doro dorp dorr dort dotd doto dott dpdt drod drof drop drot dtdp dtor dtot dttp fdot ffff ffrr fftf fofo food foof foot fopp for- ford foro forr fort foto fotp fott fpdt fprf frop frot frpd ftop oddd odoo odop odor odot odrp ofdr off- offo offr ofor oftp ooff oooo oord oort ootp opo- opor oppo opto ordo orff oro- orof oror orot orro orto otfp oto- otof otoo otor otpp otro otto pdpr pfff pffr pfft pod- podd podo poff pood poof poop poor poot pop- popo popp popt poro porr port potd potf poto pott ppod pppd pppo pppp pprf pptt pro- prod prof proo prop prot prpd prrd prtp prtr ptop ptpd ptrd ptrf rodd rodo roff rofo rood roof roop roor root ropo roro rort roto rotr rott rpdp rpof rptd rrrr rtdt rttp tdff tdor tfot tfpt tftp todd todo todt toff tofo toft tood toof toor toot top- topd topf topo topp topt tord torf toro torp torr tort totd toto totr tott tpdf tppd tppp tppr tptp tptr trfd trfr trod troo trop trot trpp trtr ttff ttop tttt