/*

 几何

 求给定三角形的外接圆圆心

 方法：求解二元方程组

 */

 #include<stdio.h>

 #include<string.h>

 #include<math.h>

 #include<stdlib.h>

 const double pi = acos(-1.0);

 const double eps = 1e-;

 struct Point{

     double x,y;

 };

 struct Circle{

     Point center;

     double r;

 };

 Point a,b,c,tp;

 Circle cc;

 double dis( Point a,Point b ){

     return sqrt( (a.x-b.x)*(a.x-b.x)+(a.y-b.y)*(a.y-b.y) );

 }

 bool JudgeTriangle( Point a,Point b,Point c ){

     double len1 = dis( a,b );

     len1 *= len1;

     double len2 = dis( a,c );

     len2 *= len2;

     double len3 = dis( b,c );

     len3 *= len3;

     if( len1+len2-len3<=||len1+len3-len2<=||len2+len3-len1<= ) return false;

     else return true;

 }/*判断是否是钝角三角形*/

 void GetCircle( Point a,Point b,Point c ){

     bool judge = JudgeTriangle( a,b,c );

     if( judge==false ){

         double ans;

         int op ;

         double len1 = dis( a,b );

         ans = len1;

         op = ;

         double len2 = dis( a,c );

         if( len2>ans ){

             ans = len2;

             op = ;

         }

         double len3 = dis( b,c );

         if( len3>ans ){

             ans = len3;

             op = ;

         }

         cc.r = ans / 2.0;

         if( op== ){

             cc.center.x = ( a.x+b.x )/2.0;

             cc.center.y = ( a.y+b.y )/2.0;

         }

         else if( op== ){

             cc.center.x = ( a.x+c.x )/2.0;

             cc.center.y = ( a.y+c.y )/2.0;

         }

         else {

             cc.center.x = ( b.x+c.x )/2.0;

             cc.center.y = ( b.y+c.y )/2.0;

         }

         return ;

     }/*钝角三角形*/

     double x1 = a.x,x2 = b.x,x3 = c.x;

     double y1 = a.y,y2 = b.y,y3 = c.y;

     cc.center.x=((y2-y1)*(y3*y3-y1*y1+x3*x3-x1*x1)-(y3-y1)*(y2*y2-y1*y1+x2*x2-x1*x1))/(*(x3-x1)*(y2-y1)-*((x2-x1)*(y3-y1)));

     cc.center.y=((x2-x1)*(x3*x3-x1*x1+y3*y3-y1*y1)-(x3-x1)*(x2*x2-x1*x1+y2*y2-y1*y1))/(*(y3-y1)*(x2-x1)-*((y2-y1)*(x3-x1)));

     cc.r = dis( cc.center,a );

     return ;

 }/*求外接圆圆心*/ 

 int main(){

     int T;

     scanf("%d",&T);

     int ca = ;

     while( T-- ){

         scanf("%lf%lf%lf%lf%lf%lf%lf%lf",&a.x,&a.y,&b.x,&b.y,&c.x,&c.y,&tp.x,&tp.y);

         GetCircle( a,b,c );

         printf("Case #%d: ",ca++);

         if( dis( tp,cc.center )<=cc.r ) printf("Danger\n");

         else printf("Safe\n");

     }

     return ;

 }