nnnn nnot nnpr nntn non- nonn nono nont noo- noon nooo noop noor noot nor- norn noro norr nort not- noto nott nprt nptn nron nrpn ntop ntoz ntto nttr nzpp onno onon onor onoz onpt ont- onto onzo oont oooo oort ootp opo- opon opor oppo optn opto orno oro- oron oror orot oroz orro orto orzo oto- oton otoo otor otpp otro otto ozon pnon pnot pnpo pnpp pnro pntr pono ponp pont poon poop poor poot pop- popo popp popt porn poro porr port porz poto pott pozo pppn pppo pppp pptn pptt prnp pro- pron proo prop prot proz prtp prtr ptop rnnt rnot rntp rono ront roon roop roor root rooz ropo roro rort rotn roto rotr rott rozz rpon rppn rptn rrrr rttp tonn tono toon toor toot top- topo topp topt topz torn toro torp torr tort toto totr tott tozo tpon tppp tppr tptp tptr trno tron troo trop trot trpn trpp trtr tton ttop tttt tzzt z-ro zon- zoo- zoon zoop zoot zorn zoro zort zott zotz zozo zrtp ztop zzzz