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
class BeautifulYear:
    def solve(self, year):
        for x in range(year+1,year+120):
            output = []
            for index in list(str(x)):
               if str(index) in output:
                   break
               else:
                   output+=str(index)
            if len(output)==4:
                return int("".join(output))

if __name__ == "__main__":
    year = int(raw_input())
    by = BeautifulYear()
    print by.solve(year)
