#include <iostream>
using namespace std;
int a, b, c;
int main()
{
while(cin>>a>>b>>c){
if (a<b+c && b<a+c && c<a+b && a>0 && b>0 && c>0 && a<10000 && b<10000 && c<10000)
{
if(c>a)
{
if(c>b)
{
if(c*c==a*a+b*b)
{
cout<<"prostokatny"<<endl;
}
else
{
if(c*c>a*a+b*b)
{
cout<<"rozwartokatny"<<endl;
}
else
if(c*c<a*a+b*b)
{
cout<<"ostrokatny"<<endl;
}
}
}
else
{
if(b*b==a*a+c*c)
{
cout<<"prostokatny"<<endl;
}
else
{
if(b*b>a*a+c*c)
{
cout<<"rozwartokatny"<<endl;
}
else
{
if(b*b<a*a+c*c)
{
cout<<"ostrokatny"<<endl;
}
}
}
}
}else
{
if(a>b)
{
if(a*a==b*b+c*c)
{
cout<<"prostokatny"<<endl;
}
else
{
if(a*a>b*b+c*c)
{
cout<<"rozwartokatny"<<endl;
}
else
{
if(a*a<b*b+c*c)
{
cout<<"ostrokatny"<<endl;
}
}
}
}else
{
if(b*b==a*a+c*c)
{
cout<<"prostokatny"<<endl;
}
else
{
if(b*b>a*a+c*c)
{
cout<<"rozwartokatny"<<endl;
}
else
{
if(b*b<a*a+c*c)
{
cout<<"ostrokatny"<<endl;
}
}
}
}
}
}else{cout<<"brak"<<endl;}
return 0;
}
}
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