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(n):
    n=list(str(n))
    cnt=[]
    for _ in range(0,10):
        cnt.append(0)
    for c in n:
        cnt[int(c)]+=1
    r=1
    for i in range(0,10):
        if(cnt[i]>1):
            r=0
            break
    return r

year=int(input())
ans=year+1
while(True):
    if(beautiful(ans)):
        print(ans)
        break
    ans+=1
