#D13028. Vasya and Multisets
Vasya and Multisets
Vasya and Multisets
Vasya has a multiset s consisting of n integer numbers. Vasya calls some number x nice if it appears in the multiset exactly once. For example, multiset {1, 1, 2, 3, 3, 3, 4} contains nice numbers 2 and 4.
Vasya wants to split multiset s into two multisets a and b (one of which may be empty) in such a way that the quantity of nice numbers in multiset a would be the same as the quantity of nice numbers in multiset b (the quantity of numbers to appear exactly once in multiset a and the quantity of numbers to appear exactly once in multiset b).
Input
The first line contains a single integer n~(2 ≤ n ≤ 100).
The second line contains n integers s_1, s_2, ... s_n~(1 ≤ s_i ≤ 100) — the multiset s.
Output
If there exists no split of s to satisfy the given requirements, then print "NO" in the first line.
Otherwise print "YES" in the first line.
The second line should contain a string, consisting of n characters. i-th character should be equal to 'A' if the i-th element of multiset s goes to multiset a and 'B' if if the i-th element of multiset s goes to multiset b. Elements are numbered from 1 to n in the order they are given in the input.
If there exist multiple solutions, then print any of them.
Examples
Input
4 3 5 7 1
Output
YES BABA
Input
3 3 5 1
Output
NO
inputFormat
Input
The first line contains a single integer n~(2 ≤ n ≤ 100).
The second line contains n integers s_1, s_2, ... s_n~(1 ≤ s_i ≤ 100) — the multiset s.
outputFormat
Output
If there exists no split of s to satisfy the given requirements, then print "NO" in the first line.
Otherwise print "YES" in the first line.
The second line should contain a string, consisting of n characters. i-th character should be equal to 'A' if the i-th element of multiset s goes to multiset a and 'B' if if the i-th element of multiset s goes to multiset b. Elements are numbered from 1 to n in the order they are given in the input.
If there exist multiple solutions, then print any of them.
Examples
Input
4 3 5 7 1
Output
YES BABA
Input
3 3 5 1
Output
NO
样例
4
3 5 7 1
YES
ABAB