This pill could be split into quarters; it's got three "cuts" for lack of a better description. It's long, rectangular, white, and skinny. The first quarter is blank, the next quarter has a 1 imprinted on it, the third quarter is blank, and the last quarter has a 1 imprinted on it. The other side has no numbers, letters or anything imprinted in it; it's blank but for the "cuts" which allows the pill to be quartered. What is it? Thanks to anyone who could help...