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 digRepeat(n):
    s=list(str(n))
    for i in range (0,len(s)):
        for j in range (i+1,len(s)):
            if s[i] == s[j] :
                return True
                print("hjbjiu")
            else:
                pass
digRepeat(1988)
year1 = int(input())
year2 = 0
while (year2 == 0):
    if digRepeat(year1+1) == True:
        year1 = year1 + 1
    else :
        year2 = year1
print(year2+1)