#pragma warning (disable: 4996)
#include <stdio.h>
#include <stdlib.h>
void Input(int&a, int &b, int &c);
void Check(int a, int b, int c);
int main()
{
	int a, b, c;
	Input(a, b, c);
	Check(a, b, c);
	system("pause");
	return 0;
}
void Input(int &a, int &b, int &c)
{
	scanf("%d%d%d", &a, &b, &c);
}
void Check(int a, int b, int c)
{
	if (((a == 10) && (b != 10) && (c != 10)) || ((a != 10) && (b == 10) && (c != 10)) || ((a != 10) && (b != 10) && (c == 10)))
		printf("Dung !\n");
	else
		printf("Sai !\n");

}