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()
e=str(n)
if int(n)>=1987 and int(n)<2013:
    print(2013)
else:
    while 1:
        e=int(e)+1
        e=str(e)
        e=list(e)
        y=set(e)
       # print(y,e)
        if len(y)==4:
            s = ""
            for i in e:
                s += i
            print(s)
            break
        s1=""
        for i in e:
            s1+=i
        e=s1