#include<stdio.h>
#include<ctype.h>

FILE *f = fopen("tm.in","r");
FILE *g = fopen("tm.out","w");

#define MaxN 1100
#define MaxLit 4

int T,B[MaxLit];
char S[MaxN];

int main()
{
	fscanf(f,"%d\n",&T);
	for(int i=1;i<=T;i++)
	{
		fgets(S,sizeof(S),f);
		B[0] = B[1] = B[2];
		for(int j=0;isalpha(S[j]);j++)
			B[S[j]-'a'] ++;
		if(B[0] == B[1] || B[1] == B[2])
			fprintf(g,"DA\n");
		else
			fprintf(g,"NU\n");
	}
	
	fclose(f);
	fclose(g);
	return 0;
}