This is where the "square" part comes in. Because of this, any sequence of numbers 1-5 or 1-6 can be decoded into the corresponding square's alphabet. Thus if we rearrange the numbers of our encoded message, even splitting up the numbers which compose single letters (Y = 51), we can decode the new sequence of numbers into a string of completely different letters. This also conceals the use of the Polybius square, as we have returned to the original alphabet instead of numbers 1-6 which are more easily identified as resulting from a method such as this.

As a simple example, take the encoded kitten message from above (51334 33624 33122 34142 33162 33214 25234 24215 32) and split it into two by removing every other number:

Writing these two lines one after the other, we get: 534323124431231224413 133643231236324532252. And finally, using the 6x6 square to turn these newly arranged number pairs into letters again, we arrive at: