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
yr=input()
n=int(yr)
n+=1
yr=str(n)
flag=0
while flag==0:
    count=0
    for i in range(4):
        for j in range(i+1,4):
            if yr[i]!=yr[j]:
                count+=1
        if count==6:
            flag=1
            print(yr)
            break
    n=int(yr)
    n+=1
    yr=str(n)
