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 = int(input())
m = [n // 1000, (n - (n // 1000) * 1000) // 100,
     (n % 100 - n % 10) // 10, n % 10]
b = set(m)
v = n + 1
q = [v // 1000, (v - (v // 1000) * 1000) // 100,
     (v % 100 - v % 10) // 10, v % 10]
s = set(q)
while len(s) != 4:
    v += 1
    q = [v // 1000, (v - (v // 1000) * 1000) // 100,
         (v % 100 - v % 10) // 10, v % 10]
    s = set(q)

print(v)
