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 numbers = [];
var startYear = +readline();
for (var year = ++startYear; ; year++)
   {
       if(AreDigitsDifferent(year))
             {
                    print(year);
                    break;
             }
   }
function AreDigitsDifferent(number)
{
    var result = [];
    var remainder;
   var digitsQuantity = 0;
     while(number)
        {
             remainder = number % 10;

             if (result.indexOf(remainder) === -1)
                   {
                         result.push(remainder);
                   }
              number = div(number);
             digitsQuantity++;
        }
    return result.length === digitsQuantity; 
}

function div(number)
{
    return (number - number % 10) / 10;
}