silng islng sling lsing ilsng lisng sinlg isnlg snilg nsilg inslg nislg slnig lsnig snlig nslig lnsig nlsig ilnsg linsg inlsg nilsg lnisg nlisg silgn islgn slign lsign ilsgn lisgn sigln isgln sgiln gsiln igsln gisln slgin lsgin sglin gslin lgsin glsin ilgsn ligsn iglsn gilsn lgisn glisn singl isngl snigl nsigl insgl nisgl signl isgnl sginl gsinl igsnl gisnl sngil nsgil sgnil gsnil ngsil gnsil ingsl nigsl ignsl ginsl ngisl gnisl slngi lsngi snlgi nslgi lnsgi nlsgi slgni lsgni sglni gslni lgsni glsni sngli nsgli sgnli gsnli ngsli gnsli lngsi nlgsi lgnsi glnsi nglsi gnlsi ilngs lings inlgs nilgs lnigs nligs ilgns ligns iglns gilns lgins glins ingls nigls ignls ginls ngils gnils lngis nlgis lgnis glnis nglis gnlis
Note: these 'words' (valid or invalid) are all the permutations of the word silng. These words are obtained by scrambling the letters in silng.