#try to avoid input function
a = int(input())
b = int(input())
c = int(input())
if a+b+c == 180 and 0 < a < 180 and 0 < b < 180 and 0 < c < 180:
if a == b == c:
print("Equilateral Triangle")
elif a == b or a == c or b == c:
print("Isosceles Triangle")
else:
print("Scalene Triangle")
else:
print("Invalid triangle")
Click the run button. Try to avoid input() function.