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 cons(ch):
    j=0
    w = True
    while j < len(ch):
        for i in range(0,len(ch)):
            if ch[i] == ch[j] and i!=j:
                w = False
        j = j + 1
    return w
x = int(input())
s = str(x+1)
while not(cons(s)):
    s = str(int(s)+1)
print(s)

