It seems like the year of 2013 came only yesterday. Do you know a curious fact? The year of 2013 is the first year after the old 1987 with only distinct digits.

Now you are suggested to solve the following problem: given a year number, find the minimum year number which is strictly larger than the given one and has only distinct digits.

Input

The single line contains integer y (1000 ≤ y ≤ 9000) — the year number.

Output

Print a single integer — the minimum year number that is strictly larger than y and all it's digits are distinct. It is guaranteed that the answer exists.

Examples

Input

1987


Output

2013


Input

2013


Output

2014

def isUnique(num):
    s1 = [str(i) for i in str(num)]
    s2 = set(s1)
    return len(s1) == len(s2)

def go(t):

    t += 1
    while True:
        if isUnique(t):
            return t
        t += 1

    return



if __name__ == '__main__':

    t = int(input())

    print(go(t))