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
def main():

    number = (int)(input())
    out = 0

    while(out == 0):

        number += 1
        listNumbers = [int(x) for x in str(number)]
        listNumbers = set([x for x in listNumbers if listNumbers.count(x) > 1])

        if(not listNumbers):

            out = 1

    print(number)

if __name__ == '__main__':
    main()
	    	  	  		   		 			    	 	