It is now winter, and Sam is now going back to school! This time, he needs gloves. he has 6 pairs of blue gloves and 6 pairs of white gloves and the gloves are all mixed up. He must grab a pair in complete darkness. He wants a 100 percent chance of getting a pair. He doesn't care whether it's a blue pair or a white pair, and the gloves can be different colours.
What is the least number of gloves he needs to grab?