Ring Letters. (Eg: AU 12345 2017)

[ArcherPigeons]

Thank you for your great program.

I have a suggestion. In my country, every club has different ring letters. One might be XYZ, another ABC etc.

So sometimes you can have two pigeons with the same number but different letters, because the rings are from different clubs. For example ABC 123 2017 and XYZ 123 2017.

Is it possible to add a field for ring letters as well as the number and year?