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 neweve(n):
    a=""
    for i in range(len(n)):
        if n[i] not in a:
            a=a+n[i]
            if len(a)==len(n):
                print(n)
        else:
            n=str(int(n)+1)
            neweve(n)
            break
y=int(input())
n=str(y+1)
neweve(n)