rerig errig rreig rreig errig rerig reirg erirg rierg irerg eirrg ierrg rrieg rrieg rireg irreg rireg irreg erirg reirg eirrg ierrg rierg irerg rergi errgi rregi rregi errgi rergi regri ergri rgeri greri egrri gerri rrgei rrgei rgrei grrei rgrei grrei ergri regri egrri gerri rgeri greri reigr erigr riegr iregr eirgr iergr regir ergir rgeir greir egrir gerir riger irger rgier grier igrer girer eigrr iegrr egirr geirr igerr gierr rrige rrige rirge irrge rirge irrge rrgie rrgie rgrie grrie rgrie grrie rigre irgre rgire grire igrre girre rigre irgre rgire grire igrre girre erigr reigr eirgr iergr riegr iregr ergir regir egrir gerir rgeir greir eigrr iegrr egirr geirr igerr gierr riger irger rgier grier igrer girer
Note: these 'words' (valid or invalid) are all the permutations of the word rerig. These words are obtained by scrambling the letters in rerig.