In a small community, there are three friends: Alice, Bob, and Charlie. They decided to share a collection of toys equally among themselves. Initially, Alice had 10 toys, Bob had 20 toys, and Charlie had 15 toys. After redistributing some toys, each friend ended up with the same number of toys. How many toys did they each end up with, and how many toys did Alice give away or receive? Let's think step by step and output the final answer within \boxed{}.
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