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

n=int(input())
n=n+1
j=str(n)

s=list(j)
i=0
s2=sorted(s)

while i==0:
        if s2[0] != s2[1] != s2[2] != s2[3]:
            i+=1

        else:
            n=n+1
            j=str(n)
            s=list(j)
            s2=sorted(s)
            i=0
print(n)