pubic upbic pbuic bpuic ubpic bupic puibc upibc piubc ipubc uipbc iupbc pbiuc bpiuc pibuc ipbuc bipuc ibpuc ubipc buipc uibpc iubpc biupc ibupc pubci upbci pbuci bpuci ubpci bupci pucbi upcbi pcubi cpubi ucpbi cupbi pbcui bpcui pcbui cpbui bcpui cbpui ubcpi bucpi ucbpi cubpi bcupi cbupi puicb upicb piucb ipucb uipcb iupcb pucib upcib pcuib cpuib ucpib cupib picub ipcub pciub cpiub icpub cipub uicpb iucpb ucipb cuipb icupb ciupb pbicu bpicu pibcu ipbcu bipcu ibpcu pbciu bpciu pcbiu cpbiu bcpiu cbpiu picbu ipcbu pcibu cpibu icpbu cipbu bicpu ibcpu bcipu cbipu icbpu cibpu ubicp buicp uibcp iubcp biucp ibucp ubcip bucip ucbip cubip bcuip cbuip uicbp iucbp ucibp cuibp icubp ciubp bicup ibcup bciup cbiup icbup cibup
Note: these 'words' (valid or invalid) are all the permutations of the word pubic. These words are obtained by scrambling the letters in pubic.