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
q=int(input())
q+=1
n=q
a=n%10
n=n//10
b=n%10
n=n//10
c=n%10
n=n//10
d=n%10
while d==a or d==b or d==c or a==b or a==c or b==c:
        q+=1
        n=q
        a=n%10
        n=n//10
        b=n%10
        n=n//10
        c=n%10
        n=n//10
        d=n%10
print(q)