https://spreadsheets.google.com/ccc?...QL&hl=en#gid=0
you can also remove pairs and have less than 20 pairs if you want, it will just have blank spots or I can list what to edit to get rid of the blanks. if there is much interest in the file
If you use this version you enter the data only on the page called entry page, no other page needs to be modified.