CodeForces 271A - Beautiful Year

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.

Example

Input

1987

Output

2013

Input

2013

Output

2014

代码如下：

#include<stdio.h>
int main()
{
	int a[4], n, i;
	scanf("%d", &n);
	for (i = n+1; i <9001 ; i++)
	{
		a[0] = i / 1000;
		a[1] = i / 100 % 10;
		a[2] = i / 10 % 10;
		a[3] = i % 10;
		if (a[0] != a[1] && a[0] != a[2] && a[0] != a[3] && a[1] != a[2] && a[1] != a[3] && a[2] != a[3])
		{
			printf("%d\n", i);
			break;
		}
	}
	return 0;
}