rt

#define int long long
using namespace std;

signed main()
{
    int l,r;
    cin >> l >> r;
    if(r - l >= 10)
    {
        cout << 2;
        return 0;
    }
    else for(int i = 1;i <= 1e18;i *= 10)
        if(r % (i * 10) >= 3 * i && l % (i * 10) <= 3 * i - 1)
        {
            cout << 2;
            return 0;
        }
    cout << 1;
    return 0;
}