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
n = input()
m = int(n) + 1
s = "aa" + str(m) + "aa"
ans = 0
while ans == 0:
    z = 0
    for i in range(2, 6):
        if (s[i] in s[:i]) or (s[i] in s[i + 1:]):
            s = "aa" + str(int(s[2:-2]) + 1) + "aa"
            break
        else:
            z += 1
        if z == 4:
            ans = s[2:-2]
            break
print(ans)