a,b,c=map(int,input().split()) if a+b<c and b+c<a and c+a<b: print('NO') elif a**2+b**2==c**2 or b**2+c**2==a**2 or c**2+a**2==b**2: print('Isosceles Triangle') elif a==b==c: print('Equilateral Triangle') elif a==b or a==c or b==c: print('Isosceles Triangle') else: print('Simpe Triangle')