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
num=int(input())
num+=1
while(True):
    nstr=str(num)
    q=1
    for i in range(len(nstr)):
        if nstr[i] in nstr[:i] or nstr[i] in nstr[i+1:]:
            q=0
    if(q==1):
        print(num)
        break
    num+=1
        