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
import sys
year = int(input())

if year >= 1987 and year < 2013:
    print(2013)
else:
    for i in range(year + 1, 9013):
        strYear = str(i)
        boolean = True
        dic = {}
        for j in strYear:
            if j in dic:
                boolean = False
                break
            else:
                dic[j] = 1 
        if boolean:
            print(i)
            sys.exit(0)

		  	   	 		    	 			  					 	