Hi,
You may find these notes useful if you have any more. You can include details of the letter count and known pattern in the question details box. If you need to add any info afterwards you don't need to start a new question you can just add it as a reply to your own question-
Red coat (British Army and Royal Marines) - Wikipedia
Red coat or Redcoat is a historical term used to refer to soldiers of the British Army and Royal Marines ... countries that made up the British Empire.