effere effete efreet efter- efters eretes errest errett erster eskers eskert eskett essert essess esssse estees esters estree estres estter esttes f-test feeres feeses fekete ferfer ferrer ferres ferret fertee fertek ferter fesere fesser fesses fester fetter fettes freers freese freest frefre freres fresse fresst frette fretts fterer fterre k-tree keefer keeffe keeker kefefs keftes kekes kereft kereks kerker kersee kerser kertee kesses kester ketter kreese krefft kreker kresek kresse kreste kretek r-tree reefer reeffe reeker reekes reeser reeses reests refeet refeff refers refert refete refret refter rerees reseek resees resets resket rester restes restte reteer retees reteet retere retest retree retret retter see-er seeker seesee sekere sekret serefe serere serers serest serket serre- serres serret sesser sesses sester sestet sestre setees seters setfee settee setter skeets skerre skreef skreek sssfrs steeks steere steers stere- sterer steres sterke sterks sterre sterte steske streek street streke stress strete t-test t-tree teerts teests teetee teeter tekkes terese terete terets terrer terres terret terser terset terter tertre teseke tesker tesser tesses testee tester testes teteks tetete tetter treete treets trefet trefte treker trekse tresse tretee tretes trette tsetse tsktsk ttests