pb47

#include <iostream>

using namespace std;

int main ()
{

 unsigned long a,b,ok=0,cb,uc;//

 cout<<"a=";cin>>a;
 cout<<"b=";cin>>b;
 cb=b;

  while (a&&!ok)
  {
      uc=a%10; cb=b;
      while (!ok&&cb) {
      if (uc==cb%10)
        ok=1;
        cb/=10;
      }
      a/=10;
  }

 if (ok)
    cout<<"DA";
 else
    cout<<"NU";

return 0;
}