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
if __name__ == '__main__':
    year = int(input())
    while (True):
        dict = {}
        year += 1
        for i in str(year):
            if i not in dict:
                dict[i] = 1
            else:
                dict[i] += 1
        if len(dict) == 4:
            print(year)
            break

           		 			  	  		  	 			