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