#include <iostream>
#include <queue>
using namespace std;
queue <int> c;
int n,x,ogl;
int main()
{
    cin>>n;
    x=n;
    while(x!=0)
    {
        c.push(x%10);
        x/=10;
    }
    while(!c.empty())
    {
        ogl=ogl*10+c.front();
        c.pop();
    }
    if(ogl==n)
        cout<<"DA";
    else
        cout<<"NU";
    return 0;
}