rubli urbli rbuli bruli ubrli burli rulbi urlbi rlubi lrubi ulrbi lurbi rblui brlui rlbui lrbui blrui lbrui ublri bulri ulbri lubri bluri lburi rubil urbil rbuil bruil ubril buril ruibl uribl riubl irubl uirbl iurbl rbiul briul ribul irbul birul ibrul ubirl buirl uibrl iubrl biurl iburl rulib urlib rluib lruib ulrib lurib ruilb urilb riulb irulb uirlb iurlb rliub lriub rilub irlub lirub ilrub ulirb luirb uilrb iulrb liurb ilurb rbliu brliu rlbiu lrbiu blriu lbriu rbilu brilu riblu irblu birlu ibrlu rlibu lribu rilbu irlbu lirbu ilrbu bliru lbiru bilru iblru libru ilbru ublir bulir ulbir lubir bluir lbuir ubilr builr uiblr iublr biulr ibulr ulibr luibr uilbr iulbr liubr ilubr bliur lbiur bilur iblur libur ilbur
Note: these 'words' (valid or invalid) are all the permutations of the word rubli. These words are obtained by scrambling the letters in rubli.