gggg ggpo gogo goog goop goor goot gopo gorg goro gorp gorr gort goto gott gpgp gpot gprp grog groo grop gror grot grrr gtop ogog ogro oooo oort ootp opo- opor oppo opto orgo oro- oror orot orro orto oto- otog otoo otor otpp otro otto pogg pogo poop poor poot pop- popo popp popt porg poro porr port poto pott pppo pppp pptt pro- prog proo prop prot prtp prtr ptop rgtr rogg rogo roog roop roor root ropo roro rort rotg roto rotr rott rrrr rttp togo togr togt toor toot top- topo topp topt torg toro torp torr tort toto totr tott tppp tppr tptp tptr trog troo trop trot trpg trpp trtr ttop tttt