#include <iostream>
using namespace std;
long long n,k,uc;
int main()
{
cin>>n>>k;
while(n!=0)
{
uc=n%10;
if(uc<=k)
n=n/10;
else
{
cout<<"NU";
return 0;
}
}
if(uc<=k)
cout<<"DA";
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwpsb25nIGxvbmcgbixrLHVjOwppbnQgbWFpbigpIAp7CiAgICBjaW4+Pm4+Pms7CiAgICB3aGlsZShuIT0wKQogICAgewogICAgICAgIHVjPW4lMTA7CiAgICAgICAgaWYodWM8PWspCiAgICAgICAgbj1uLzEwOwogICAgICAgIGVsc2UKICAgICAgICB7CiAgICAgICAgCWNvdXQ8PCJOVSI7CiAgICAgICAgCXJldHVybiAwOwogICAgICAgIH0KICAgIH0KICAgIGlmKHVjPD1rKQogICAgY291dDw8IkRBIjsKICAgIHJldHVybiAwOwp9