What-If Analysis

I need help with what-if analysis. I need to compare multiple columns from B to E, and get the input from Column A.

For instance, I have 10 health supplements in column A. In column B, D, E, & F, represent 4 times in the day. B - E has "Yes" in the column if the supplement is supposed to be taken at that time of day. What I need to do is to look for "Yes" in columns B - E, and replace the "Yes" with the name of the supplement from column A. Example pasted below:

Product Morning Noon Afternoon Evening
Hydrocuts Yes Yes Yes
Protein Yes Yes Yes
ZMA Yes Yes
AKG Yes Yes Yes
Viatmins Yes Yes
Antioxidant Yes Yes

Any help would be appreciated.