I've been quite poorly lately and the doctor has prescribed me a two courses of tablets (Anvilite and Bigoxy) to solve my problem and I must take one of each at the same time, once every day.
These tablets are rather expensive so I've been very careful with them.
Last night I'd just got my Anvilite tablet. I was about to get my Bigoxy tablet when two tablets fell out of the bottle into my hand and joined the Anvilite tablet. This was a major problem for me as all three tablets were identical, the same size, the same weight, and neither had any markings on it. I had to take one of each but I couldn't tell them apart, and they were far too expensive to throw these three tablets away and start again.
What did I do?
Hint: Can I add something to the three tablets to help?