grews rgews gerws egrws regws ergws grwes rgwes gwres wgres rwges wrges gewrs egwrs gwers wgers ewgrs wegrs rewgs erwgs rwegs wregs ewrgs wergs gresw rgesw gersw egrsw regsw ergsw grsew rgsew gsrew sgrew rsgew srgew gesrw egsrw gserw sgerw esgrw segrw resgw ersgw rsegw sregw esrgw sergw grwse rgwse gwrse wgrse rwgse wrgse grswe rgswe gsrwe sgrwe rsgwe srgwe gwsre wgsre gswre sgwre wsgre swgre rwsge wrsge rswge srwge wsrge swrge gewsr egwsr gwesr wgesr ewgsr wegsr geswr egswr gsewr sgewr esgwr segwr gwser wgser gswer sgwer wsger swger ewsgr wesgr eswgr sewgr wsegr swegr rewsg erwsg rwesg wresg ewrsg wersg reswg erswg rsewg srewg esrwg serwg rwseg wrseg rsweg srweg wsreg swreg ewsrg wesrg eswrg sewrg wserg swerg
Note: these 'words' (valid or invalid) are all the permutations of the word grews. These words are obtained by scrambling the letters in grews.