#include<bits/stdc++.h> using namespace std; int main() { int a,b,c; cin>>a>>b>>c; if(a+b>c&&a+c>b&&c+b>a) { if(a==b&&b==c) { cout<<"equilateral triangle"; } else if(a==b||a==c||b==c) { cout<<"lsosceles triangle"; } else if(a*a+b*b==c*c||a*a+c*c==b*b||b*b+c*c==a*a) { cout<<"right triangle"; } else { cout<<"simple triangle"; } } else { cout<<"no"; } return 0; }