#include<stdio.h> int main() { float a = 0; float b = 0; float c = 0; while(scanf("%f %f %f",&a,&b,&c) != EOF) { getchar(); if(a+b>c && a+c>b && b+c>a) { if(a==b && b==c) printf("Equilateral triangle!\n"); else if (a==b||b==c||a==c) printf("Isosceles triangle!\n"); else printf("Ordinary triangle!\n"); } else printf("Not a triangle!\n"); }; return 0; }