#include <fstream>
#include <cmath>
using namespace std;
ifstream in("date.in");
ofstream out("date.out");


struct pct{
char lit;
int x;
int y;
};

pct x[8];
int i,j,k;

int calc(pct a, pct b){
int f=(a.x-b.x)*(a.x-b.x)+(a.y-b.y)*(a.y-b.y);
f=sqrt(f);
return f;
}



int main()
{

for(i=1;i<=7;i++){ in>>x[i].lit>>x[i].x>>x[i].y; }

for(i=1;i<=7;i++){

for(j=i+1;j<=7;j++){

for(k=j+1;k<=7;k++){
int c=0, p=0,f=1;

int l1=calc(x[i],x[j]);
int l2=calc(x[k],x[j]);
int l3=calc(x[i],x[k]);

if(l1==l2) c++;
if(l2==l3) c++;
if(l1==l3) c++;

if(l1*l1==l2*l2+l3*l3) p++;
if(l2*l2==l1*l1+l3*l3) p++;
if(l3*l3==l2*l2+l1*l1) p++;

out<<x[i].lit<<x[j].lit<<x[k].lit<<" este triunghi ";
if(p&c) out<<"dreptunghic isoscel";
else if(c==1) out<<"isoscel";
else if(c==3) out<<"echilateral";
else if(p) out<<"dreptunghic";
else out<<"oarecare";

out<<'\n';




}

}


}

return 0;

}