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())
n += 1
x1 = (n%10)
x2 = (n//10%10)
x3 = (n//100%10)
x4 = (n//1000)
while x1 == x2 or x1 == x3 or x1 == x4 or x2 == x3 or x2 == x4 or x3 == x4 :
    n += 1
    x1 = (n%10)
    x2 = (n//10%10)
    x3 = (n//100%10)
    x4 = (n//1000)
print(n)
