boult obult buolt ubolt oublt uoblt bolut oblut blout lbout olbut lobut bulot ublot bluot lbuot ulbot lubot oulbt uolbt olubt loubt ulobt luobt boutl obutl buotl ubotl oubtl uobtl botul obtul btoul tboul otbul tobul butol ubtol btuol tbuol utbol tubol outbl uotbl otubl toubl utobl tuobl boltu obltu blotu lbotu olbtu lobtu botlu obtlu btolu tbolu otblu toblu bltou lbtou btlou tblou ltbou tlbou oltbu lotbu otlbu tolbu ltobu tlobu bulto ublto bluto lbuto ulbto lubto butlo ubtlo btulo tbulo utblo tublo bltuo lbtuo btluo tbluo ltbuo tlbuo ultbo lutbo utlbo tulbo ltubo tlubo oultb uoltb olutb loutb ulotb luotb outlb uotlb otulb toulb utolb tuolb oltub lotub otlub tolub ltoub tloub ultob lutob utlob tulob ltuob tluob
Note: these 'words' (valid or invalid) are all the permutations of the word boult. These words are obtained by scrambling the letters in boult.