#include <iostream>
#include <algorithm>
using namespace std;

int main() {
    int a, b, c;
    cin >> a >> b >> c;

    int niza[3];
    niza[0] = a;
    niza[1] = b;
    niza[2] = c;
    sort(niza, niza + 3);
    a = niza[0];
    b = niza[1];
    c = niza[2];

    int max_a = a, max_b = b, max_c = c;
    if(a >= 5) {
        max_a = 5;
    }
    if(b >= 5) {
        max_b = 5;
    }
    if(c >= 5) {
        max_c = 5;
    }
    int sum = max_a + max_b + max_c;

    if(a + sum - max_a >= b - max_b or a + sum - max_a >= c - max_c or b + sum - max_b >= c - max_c) {
        cout << "DA" << endl;
    }
    else {
        cout << "NE" << endl;
    }
    return 0;
}