-tree eeeee efere efetf effer effet efore efter eofor eorre erere erewe eroor erore eroto errew error erte erter etete etoro etree etter etwee ewert ewfte feeor feere fefor feoff feret ferow ferr- ferre ferro ferte feter feto- fetor fette fewer fewte foore foote fore- foreo foret forow forro forte forto forwe fotte fower fowte freer freet frere frett froot frore frote ftrtt o-fer offer offew offof offre offto offwe ofoto ofter oftwo oo-er ooooo oowee oreo- orere orero orfeo orfoe orfor oroer orret orrow orter ortet ortoo ortwo orwoe otere otero ototo otter oweto owre- owte- owtte reefe reeft reere reewe refer refet reffe reffo reowe rere- reree reret rerow retee reter retew retow retro rette retto rewer rewet ro-ro roero roewe roffe rofor rooer roofe rooft roore roote rorer roter roto- rotor rotot rotte rotto rower rowet rowfe rowff rowof rowte rowto rowwe tefe teret teror terre terro tert- teter tetr- tetro tette tewer tewet tewor toeof toerr toeto toetw tofet toffo tofor tofte toore toreo toret torow torre torro torte torto toter toto- totoe totoo totte totwo towee tower towoo towre treer treet trefe treff trere trete trett trewe troee trofe troff troft trott trowe ttttt tweer tweet twere twoer twoof twoor twort twote twoto weeft weere weero weert weete weffe weore weote weowe were- werew werre werte weter wetoo wette wetto woeto wooer woore woote woree worow worre wotte wowee wowow wowte wrete wrett wroot wrote wrowe wwoof wwwww