wauff awuff wuaff uwaff auwff uawff wafuf awfuf wfauf fwauf afwuf fawuf wufaf uwfaf wfuaf fwuaf ufwaf fuwaf aufwf uafwf afuwf fauwf ufawf fuawf wauff awuff wuaff uwaff auwff uawff wafuf awfuf wfauf fwauf afwuf fawuf wufaf uwfaf wfuaf fwuaf ufwaf fuwaf aufwf uafwf afuwf fauwf ufawf fuawf waffu awffu wfafu fwafu afwfu fawfu waffu awffu wfafu fwafu afwfu fawfu wffau fwfau wffau fwfau ffwau ffwau affwu fafwu affwu fafwu ffawu ffawu wuffa uwffa wfufa fwufa ufwfa fuwfa wuffa uwffa wfufa fwufa ufwfa fuwfa wffua fwfua wffua fwfua ffwua ffwua uffwa fufwa uffwa fufwa ffuwa ffuwa auffw uaffw afufw faufw ufafw fuafw auffw uaffw afufw faufw ufafw fuafw affuw fafuw affuw fafuw ffauw ffauw uffaw fufaw uffaw fufaw ffuaw ffuaw
Note: these 'words' (valid or invalid) are all the permutations of the word wauff. These words are obtained by scrambling the letters in wauff.