lungs ulngs lnugs nlugs unlgs nulgs lugns ulgns lguns gluns uglns gulns lngus nlgus lgnus glnus nglus gnlus ungls nugls ugnls gunls nguls gnuls lunsg ulnsg lnusg nlusg unlsg nulsg lusng ulsng lsung slung uslng sulng lnsug nlsug lsnug slnug nslug snlug unslg nuslg usnlg sunlg nsulg snulg lugsn ulgsn lgusn glusn uglsn gulsn lusgn ulsgn lsugn slugn uslgn sulgn lgsun glsun lsgun slgun gslun sglun ugsln gusln usgln sugln gsuln sguln lngsu nlgsu lgnsu glnsu nglsu gnlsu lnsgu nlsgu lsngu slngu nslgu snlgu lgsnu glsnu lsgnu slgnu gslnu sglnu ngslu gnslu nsglu snglu gsnlu sgnlu ungsl nugsl ugnsl gunsl ngusl gnusl unsgl nusgl usngl sungl nsugl snugl ugsnl gusnl usgnl sugnl gsunl sgunl ngsul gnsul nsgul sngul gsnul sgnul
Note: these 'words' (valid or invalid) are all the permutations of the word lungs. These words are obtained by scrambling the letters in lungs.