#include <iostream>using namespace std;int main(void){ int a,b,i,x,ok=1; cin>>a>>b; if(b%2==1) { if(a%b==0) { x=a/b; if(x<=b/2) ok=0; } else ok=0; }else{ if((a+b/2)%b==0) { x=(a+b/2)/b; if(x<b/2+1) ok=0;
}else ok=0;}if (ok==1)cout<<"DA";else cout<<"NU";return 0;}