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
a=int(input())

for i in range(8000):
    a=int(a)
    a+=1
    a=str(a)
    A=[]
    for i in a[:]:
        A.append(i)
    p=0
    for i in A:
        count=A.count(i)
        if count==1:
            p+=1
        else:
            pass
        
    if p==4:
        print(a)
        exit()
    else:
        pass