umpty mupty upmty pumty mputy pmuty umtpy mutpy utmpy tumpy mtupy tmupy uptmy putmy utpmy tupmy ptumy tpumy mptuy pmtuy mtpuy tmpuy ptmuy tpmuy umpyt mupyt upmyt pumyt mpuyt pmuyt umypt muypt uympt yumpt myupt ymupt upymt puymt uypmt yupmt pyumt ypumt mpyut pmyut myput ymput pymut ypmut umtyp mutyp utmyp tumyp mtuyp tmuyp umytp muytp uymtp yumtp myutp ymutp utymp tuymp uytmp yutmp tyump ytump mtyup tmyup mytup ymtup tymup ytmup uptym putym utpym tupym ptuym tpuym upytm puytm uyptm yuptm pyutm yputm utypm tuypm uytpm yutpm tyupm ytupm ptyum tpyum pytum yptum typum ytpum mptyu pmtyu mtpyu tmpyu ptmyu tpmyu mpytu pmytu myptu ymptu pymtu ypmtu mtypu tmypu mytpu ymtpu tympu ytmpu ptymu tpymu pytmu yptmu typmu ytpmu
Note: these 'words' (valid or invalid) are all the permutations of the word umpty. These words are obtained by scrambling the letters in umpty.