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 beautiful(x):
        copy=x
        a=[]
        while(copy>0):
                d=copy%10
                a.append(d)
                copy=copy/10
        a.sort()
        flag=1
        for i in range(len(a)-1):
                if(a[i]==a[i+1]):
                        flag=0
                        break
        return flag
def main():
        y=input()
        if 1000<=y<=9000:
                k=y+1
                while(beautiful(k)==0):
                        k=k+1
                print k
main()