casus acsus csaus scaus ascus sacus causs acuss cuass ucass aucss uacss csuas scuas cusas ucsas sucas uscas asucs saucs auscs uascs suacs usacs cassu acssu csasu scasu ascsu sacsu cassu acssu csasu scasu ascsu sacsu cssau scsau cssau scsau sscau sscau asscu sascu asscu sascu ssacu ssacu causs acuss cuass ucass aucss uacss casus acsus csaus scaus ascus sacus cusas ucsas csuas scuas uscas sucas auscs uascs asucs saucs usacs suacs csusa scusa cussa ucssa sucsa uscsa cssua scsua cssua scsua sscua sscua cussa ucssa csusa scusa uscsa sucsa susca ussca ssuca ssuca ussca susca asusc sausc aussc uassc suasc usasc assuc sasuc assuc sasuc ssauc ssauc aussc uassc asusc sausc usasc suasc susac ussac ssuac ssuac ussac susac
Note: these 'words' (valid or invalid) are all the permutations of the word casus. These words are obtained by scrambling the letters in casus.