pools opols pools opols oopls oopls polos oplos ploos lpoos olpos lopos polos oplos ploos lpoos olpos lopos oolps oolps olops loops olops loops poosl oposl poosl oposl oopsl oopsl posol opsol psool spool ospol sopol posol opsol psool spool ospol sopol oospl oospl osopl soopl osopl soopl polso oplso ploso lposo olpso lopso poslo opslo psolo spolo osplo soplo plsoo lpsoo psloo sploo lspoo slpoo olspo lospo oslpo solpo lsopo slopo polso oplso ploso lposo olpso lopso poslo opslo psolo spolo osplo soplo plsoo lpsoo psloo sploo lspoo slpoo olspo lospo oslpo solpo lsopo slopo oolsp oolsp olosp loosp olosp loosp ooslp ooslp osolp soolp osolp soolp olsop losop oslop solop lsoop sloop olsop losop oslop solop lsoop sloop
Note: these 'words' (valid or invalid) are all the permutations of the word pools. These words are obtained by scrambling the letters in pools.