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=input()
k=0
n=int(n)
n+=1
n=str(n)
while k==0:
    p=0
    for i in range(1,len(n)):
        for j in range(i):
            if n[i]==n[j]:
                n=int(n)
                n+=1
                n=str(n)
                p=1
                break
    if p==0:
        k=1
        
print(n)
        
        