randomly permute which means that the ordering of the letters in between has not much real information in it it could be any ordering so you don't need to stick to the original order in us here they do this crammed with we can still understand it so it means there's some redundancy it means that certain sequences are just not very likely and when you read this it's close to a sequence that you're familiar with and so you can easily map it onto that and still understand words that were there originally there's another example from