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

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