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

test = int(input())
while True:
    dic = {}
    test += 1
    num = test
    lista = list(str(test))
    firstdigit = lista[0]
    dic.update({firstdigit : True})
    if lista[1] in dic:
        continue
    else:
        dic.update({lista[1]:True})
        if lista[2] in dic:
            continue
        else:
            dic.update({lista[2]:True})
            if lista[3] in dic:
                continue
            else:
                break
                
print(num)
		    	  	  	  	 	  	    			