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
var year = readline();
year = +year + 1;
var result = function(n)
    {
        n += '';
        for (var i = 0; i < n.length; i++)
        {
            for (var i1 = i + 1; i1 < n.length; i1++)
            if (n[i] === n[i1]) return false;
        }
        return true;
    }
while (result(+year) === false)
{
    result(year);
    year = +year + 1 ;
}
print(year);