#include <stdio.h>
int main()
{
double a, b, c, temp, x, y, z;
scanf("%lf %lf %lf", &a, &b, &c);
x = a;
y = b;
z = c;
if (a < b)
{
temp = a;
a = b;
b = temp;
}
if (a < c)
{
temp = a;
a = c;
c = temp;
}
if (b < c)
{
temp = b;
b = c;
c = temp;
}
if (a >= b + c)
{
printf("NAO FORMA TRIANGULO\n");
}
else
{
if ((a * a) == (b * b) + (c * c))
{
printf("TRIANGULO RETANGULO\n");
}
if ((a * a) > (b * b) + (c * c))
{
printf("TRIANGULO OBTUSANGULO\n");
}
if ((a * a) < (b * b) + (c * c))
{
printf("TRIANGULO ACUTANGULO\n");
}
if (a == b && a == c && b == c)
{
printf("TRIANGULO EQUILATERO\n");
}
if ((a == b && a != c) || (a == c & a != b) || (b == c && b != a))
{
printf("TRIANGULO ISOSCELES\n");
}
}
return 0;
}