khafs hkafs kahfs akhfs hakfs ahkfs khfas hkfas kfhas fkhas hfkas fhkas kafhs akfhs kfahs fkahs afkhs fakhs hafks ahfks hfaks fhaks afhks fahks khasf hkasf kahsf akhsf haksf ahksf khsaf hksaf kshaf skhaf hskaf shkaf kashf akshf ksahf skahf askhf sakhf haskf ahskf hsakf shakf ashkf sahkf khfsa hkfsa kfhsa fkhsa hfksa fhksa khsfa hksfa kshfa skhfa hskfa shkfa kfsha fksha ksfha skfha fskha sfkha hfska fhska hsfka shfka fshka sfhka kafsh akfsh kfash fkash afksh faksh kasfh aksfh ksafh skafh askfh sakfh kfsah fksah ksfah skfah fskah sfkah afskh faskh asfkh safkh fsakh sfakh hafsk ahfsk hfask fhask afhsk fahsk hasfk ahsfk hsafk shafk ashfk sahfk hfsak fhsak hsfak shfak fshak sfhak afshk fashk asfhk safhk fsahk sfahk
Note: these 'words' (valid or invalid) are all the permutations of the word khafs. These words are obtained by scrambling the letters in khafs.