youbt oyubt yuobt uyobt ouybt uoybt yobut oybut ybout byout obyut boyut yubot uybot ybuot byuot ubyot buyot oubyt uobyt obuyt bouyt uboyt buoyt youtb oyutb yuotb uyotb ouytb uoytb yotub oytub ytoub tyoub otyub toyub yutob uytob ytuob tyuob utyob tuyob outyb uotyb otuyb touyb utoyb tuoyb yobtu oybtu ybotu byotu obytu boytu yotbu oytbu ytobu tyobu otybu toybu ybtou bytou ytbou tybou btyou tbyou obtyu botyu otbyu tobyu btoyu tboyu yubto uybto ybuto byuto ubyto buyto yutbo uytbo ytubo tyubo utybo tuybo ybtuo bytuo ytbuo tybuo btyuo tbyuo ubtyo butyo utbyo tubyo btuyo tbuyo oubty uobty obuty bouty uboty buoty outby uotby otuby touby utoby tuoby obtuy botuy otbuy tobuy btouy tbouy ubtoy butoy utboy tuboy btuoy tbuoy
Note: these 'words' (valid or invalid) are all the permutations of the word youbt. These words are obtained by scrambling the letters in youbt.