int main()
{
    int a,b,c;
    scanf("%d %d %d",&a,&b,&c);
if(c>=a+b||b>=a+c||a>=b+c)
    {
printf("Not triangle\n");}
else if(a*a+b*b==c*c||a*a==b*b+c*c||b*b==a*a+c*c)
    {printf("Right triangle\n");}
    else if(a*a+b*b>c*c&&a*a+c*c>b*b&&b*b+c*c>a*a)
    {printf("Acute triangle\n");}
    else if(a*a+b*b<c*c||a*a+c*c<b*b||b*b+c*c<a*a)
    {printf("Obtuse triangle\n");}
    if(a==b||a==c||b==c)
    {if(c<=a+b&&b<=a+c&&a<=b+c)
        printf("Isosceles triangle\n");}
if(a==b&&a==c&&b==c)
    {printf("Equilateral triangle\n");}
    return 0;
}