#include <stdio.h>

void max(int *a, int *b) {
    int t;
    if (*a < *b) {
        t = *a;
        *a = *b;
        *b = t;
    }
}

int main() {
    int a, b, c;
    scanf("%d %d %d", &a, &b, &c);
    max(&b, &c);
    max(&a, &c);
    max(&a, &b);
if(a>=(b+c)){
printf("Not triangle");
}else{
if(a*a==(b*b+c*c)){
	printf("Right triangle\n");
}
if(a*a<(b*b+c*c)){
	printf("Acute triangle\n");
}
if(a*a>(b*b+c*c)){
	printf("Obtuse triangl\n");
}
if(a==b||a==c||b==c){
printf("Isosceles triangle\n");

}	
if(a==b&&b==c){
	printf("Equilateral triangle");
}

}





//printf("%d %d %d", a, b, c);
    return 0;
}