Weird character painted on basement wall, what does it mean?

I was doing laundry and noticed a weird symbol painted on our basement wall...it looks like a ';Y'; with 1 or 2 (cant remember exactlly) dots over each side...





We have lived in house for around 7 months now and I am curious if anyone knows what this symbol means??Weird character painted on basement wall, what does it mean?
You should take a picture of it and post it for us, I'm sure SOMEONE knows what it means.

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