#include <iostream>

using namespace std;

int Vocale(char ch)
{
    if(ch == 'a'|| ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u')return 1;
    if(ch > 'a' && ch <= 'z')return 0;
}

char s[101];

int main()
{
    cin.getline(s, 266);
    int i;
    i = 0;
    while(s[i] != 0 && s[i] == 'i')
        i++;
    if(s[i] == 0)cout << "NU";
    else
    {

    i = 0;
    while(s[i] != 0 && (Vocale(s[i]) == 0 || s[i] == 'i'))
        i++;
    if(s[i] == 0)cout << "DA";
    else cout << "NU";
    }
    return 0;
}