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