#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<string.h>

int T,tt,F,i,j;

typedef struct {double x,y,z; } tbod;
tbod f[270][250];
int pf[270],ok[270];
double objem;

double plocha(int x){
   int i;
   double sum=0; 
   
   for(i=0;i<pf[x];i++){
      sum+=(f[x][i].x*f[x][(i+1)%pf[x]].y)-(f[x][i].y*f[x][(i+1)%pf[x]].x);
   }
   return fabs(sum/2);
}

int vnutri(double x, double y, int cf) {
  int i,sum;
  sum=0;
  
  for (i=0;i<pf[cf];i++) {
    if (f[cf][i].y==f[cf][i+1].y) 
      if (f[cf][i].y<y) {
         if ((f[cf][i].x<x) && (f[cf][i+1].x>x)) sum++;
         if ((f[cf][i].x>x) && (f[cf][i+1].x<x)) sum++;
      }
  }
  return (sum%2);
}

int vnutrikocky(double x, double y, double z)
{
  int i,sum=0;
  for (i=0;i<F;i++) if (ok[i]) {
    if (f[i][0].z<z) {
      if (vnutri(x,y,i)) sum++;
    }
  }
  return (sum%2);
}

int horekocka(int cf) {
   double kdex,kdey,dx,dy;
   kdex=(f[cf][0].x+f[cf][1].x)/2;
   kdey=(f[cf][0].y+f[cf][1].y)/2;
   if (f[cf][0].x==f[cf][1].x) {
     dx=0.5; dy=0;
   } else {
     dx=0; dy=0.5;
   } 
   if (vnutri(kdex+dx,kdey+dy,cf)) {
     kdex=kdex+dx; kdey=kdey+dy;
   } else {
     kdex=kdex-dx; kdey=kdey-dy;
   }
   if (vnutrikocky(kdex,kdey,f[cf][0].z+0.5)) {
     return 1;
   }
   return 0;
}

int main() {
  scanf("%d ",&T);
  for (tt=0;tt<T;tt++) {
    scanf("%d ",&F);
    for (i=0;i<F;i++) {
      scanf("%d ",&pf[i]);
      ok[i]=1;
      for (j=0;j<pf[i];j++) {
        scanf("%lf %lf %lf ",&f[i][j].x,&f[i][j].y,&f[i][j].z);
        if (f[i][j].z!=f[i][0].z) ok[i]=0;
      }
      f[i][pf[i]].x=f[i][0].x;
      f[i][pf[i]].y=f[i][0].y;
      f[i][pf[i]].z=f[i][0].z;
    }
    
    objem=0;
    for (i=0;i<F;i++) if (ok[i]) {
      if (horekocka(i)) {
        objem-=plocha(i)*f[i][0].z;
      }
      else {
        objem+=plocha(i)*f[i][0].z;
      }
    }
    printf("The bulk is composed of %d units.\n",(int)(objem+0.5));
  }

  return 0;
}