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
year0 = int(input())

def year1(x):
    x = str(x)
    if x[1] != x[0]:
        if x[2] != x[1] and x[2] != x[0]:  
            if x[3] != x[2] and x[3] != x[1] and x[3] != x[0]:
                return 1
            else:
                return 0
        else:
            return 0
    else:
        return 0


while True:
    year0 += 1
    if year1(str(year0)) == 1:
        break

print(year0)
    