#include<stdio.h>
#include <algorithm>
//如果三条线段不能组成一个三角形,输出Not triangle;
//如果是直角三角形,输出Right triangle;
//如果是锐角三角形,输出Acute triangle;
//如果是钝角三角形,输出Obtuse triangle;
//如果是等腰三角形,输出Isosceles triangle;
//如果是等边三角形,输出Equilateral triangle。
int main(){
int a , b , c ;
scanf("%d %d %d",&a ,&b ,&c);
//从小到大排序
if(a>b){
int temp ;
temp = b;
b= a ;
a = temp;
}
if(b>c){
int swap ;
swap = b ;
b = c;
c = swap;
}
if(a>c){
int s ;
s = a ;
a = c ;
c = s ;
}
if(a+b>c&&a-b<c){
if(a==b==c){ //等边三角形的情况
printf("Equilanteral triangle\n");
printf("Isosceles triangle\n");
printf("Acute triangle");
}else if(a==b){ //等腰三角形的情况
if((a*a)+(b*b)==(c*c)){
printf("Right triangle\n");
printf("Isosceles triangle");
}else if((a*a)+(b*b)<(c*c)){
printf("Obtuse triangle\n");
printf("Isosceles triangle");
}else if((a*a)+(b*b)>(c*c)){
printf("Acute triangle\n");
printf("Isosceles triangle");
}
}else if((a*a)+(b*b)==(c*c)){//直角,锐角,钝角的情况
printf("Right triangle");
}else if((a*a)+(b*b)>(c*c)){
printf("Acute triangle");
}else if((a*a)+(b*b)<(c*c)){
printf("Obtuse triangle");
}
}else { //不满足三角形的情况
printf("Not triangle");
}
return 0;
}