#include <iostream>

using namespace std;

int main()
{
	int y;
	cin >> y;
	int found = 0;
	while (found == 0)
	{
		y++;
		int mark[10] = {}, repeat = 0, x = y;
		while (x > 0)
		{
			int d = x % 10;
			if (mark[d] == 1)
				repeat = 1;
			mark[d] = 1;
			x /= 10;
		}

		if (repeat == 0)
			found = 1;
	}
	cout << y << endl;
}