#include <stdio.h>

int main(void) { 
	int a,b,c;
	scanf("%d",&a);
	scanf("%d",&b);
	scanf("%d",&c); 
	printf("The side lengths are %d , %d , %d \n", a,b,c) ;
	int max=a , min =b , mid=c;
	
	if (b>a){
		max=b;
		min=a;
	}
	if(c> max){
		mid=max;
		max=c;
	}
	if (c<min){
		mid=min;
		min =c;
	}
	 printf ("%d , %d ,%d  \n ", min ,mid,max);
	if (min+mid>max) {
		printf("valid triangle \n");
     	if (a==b&&b==c){
		printf("Its equilateral  \n") ;
     	}
	    if (a==b||b==c||c==a){
		printf("The triangle is isoceles  \n") ;
      	}
     	 else {
	     	printf("The triangle is scalene  \n") ;}
	
	
     ((min*min + mid*mid)==(max*max))? printf("The triangle is right angled") : printf(" ");
     ((min*min + mid*mid)>(max*max))? printf("The triangle is acute") : printf("The triangle is obtuse");
    }
    else{
    	printf("Invalid triangle");
    }
	return 0;
}