小鲍正在玩一个游戏，他想赢得尽可能多的糖果。游戏中有4堆，每堆含有N个不同颜色的糖果。每次他能将一个糖果放入篮子，如果篮子里有两个相同颜色的糖果，他可以将它们拿出来放入口袋。当篮子满且没有相同颜色的糖果时，游戏结束。给出每堆糖果的颜色，求小鲍最多能带走多少对糖果。
Problem Description
Little Bob is playing a game. He wants to win some candies in it - as many as possible.
There are 4 piles, each pile contains N candies. Bob is given a basket which can hold at most 5 candies. Each time, he puts a candy at the top of one pile into the basket, and if there're two candies of the same color in it ,he can take both of them outside the basket and put them into his own pocket. When the basket is full and there are no two candies of the same color, the game ends. If the game is played perfectly, the game will end with no candies left in the piles.
For example, Bob may play this game like this (N=5):
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