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#include <stdio.h>
int main()
{
freopen("nim.in", "r", stdin);
freopen("nim.out", "w", stdout);
int n,t;
scanf("%d", &n);
for( ;n; n--)
{
scanf("%d", &t);
int primul_termen;
scanf("%d", &primul_termen);
int XOR = primul_termen, x;
t--;
for(;t ;t--)
{
scanf("%d", &x);
XOR ^= x;
}
if(XOR > 0)
printf("DA\n");
else
printf("NU\n");
}
return 0;
}