#include <bits/stdc++.h>
using namespace std;

int a[99999], b[999];
int main()
{
	int a, b, g = 0, n = 0, cnt = 0;
	cin >> a >> b;
	for (int i = a; i <= b; i++)
	{
		while (i != 0)
		{
			g++;
			b[g] = i % 10;
			i /= 10;
		}
	}
	for (int i = 1; i <= g; i++)
	{
		n++;
		a[i] = g - n;
	}
	for (int i = 1; i <= g; i++)
	{
		for (int j = 1; j <= g; j++)
		{
			if (a[i] == b[j]) cnt++;
			else exit(0);
		} 
	}
	return 0;
}