boost obost boost obost oobst oobst bosot obsot bsoot sboot osbot sobot bosot obsot bsoot sboot osbot sobot oosbt oosbt osobt soobt osobt soobt boots obots boots obots oobts oobts botos obtos btoos tboos otbos tobos botos obtos btoos tboos otbos tobos ootbs ootbs otobs toobs otobs toobs bosto obsto bsoto sboto osbto sobto botso obtso btoso tboso otbso tobso bstoo sbtoo btsoo tbsoo stboo tsboo ostbo sotbo otsbo tosbo stobo tsobo bosto obsto bsoto sboto osbto sobto botso obtso btoso tboso otbso tobso bstoo sbtoo btsoo tbsoo stboo tsboo ostbo sotbo otsbo tosbo stobo tsobo oostb oostb osotb sootb osotb sootb ootsb ootsb otosb toosb otosb toosb ostob sotob otsob tosob stoob tsoob ostob sotob otsob tosob stoob tsoob
Note: these 'words' (valid or invalid) are all the permutations of the word boost. These words are obtained by scrambling the letters in boost.