#include <iostream>
#include <string.h>

using namespace std;

int main(){
    char s[150], vocale[] = "aeou";
    int ni = 0;
    cin.getline(s, 250);
    bool ok = true;

    for(int i = 0; i < strlen(s); i++){

    if(strchr(vocale, s[i]))
        ok = false;

    if(s[i] == 'i')
        ni++;
    }

    if(ni == strlen(s))
        ok = false;

    if(ok == false)
        cout << "NU";
    else
        cout << "DA";
}