#include <iostream>
using namespace std;
int main()
{
    string zbor;
    cin >> zbor;
    
    char c;
    cin >> c;
    
    for(int i = 0; i < zbor.size(); i++) {
        if(zbor[i] == c) {
            cout << "DA" << endl;
            return 0;
        }
    }
    
    cout << "NE" << endl;
    return 0;
}