Outline
If we have a skip of 3, then:
The social network said its members had expressed concerns that they were missing 'important updates' from the people they cared about.
becomes:
T cleo ii mrh psdoesh eweii mrnuasfmhpp eceauT cleo ii mrh psdoesh eweii mrnuasfmhpp eceauT cleo ii mrh psdoesh eweii mrnuasfmhpp eceau
For example if we have plain text of "01234567", with a jump of 3 we get:
03614725
Now we take "epnlhtea", and match:
03614725 epnlhtea
Let's take the first three charactersof 0, 1 and 2, which are e, l and e:
eleXXXX
Next 3, 4 and 5, which are p, h and a:
elephaXX
Finally for 6 and 6, which are n and t
elephant