One morning you wake to find the power is out and you'll need to dress in the dark.
You know you have eight black socks and twelve brown socks in your sock drawer. But you're not the most orderly person in the world and the socks are all jumbled up, so you can't tell one color from another in the dark.
What's the minimum number of socks you'll need to grab in order to ensure that you'll have two socks of the same color?