s1=int(input("enter the 1st sidee of a triangle:"))
s2=int(input("enter the 2nd side of a triangle:"))
s3=int(input("enter the 3rd side of a triangle:"))
if s1==s2 and s2==s3:
  print("It is an equilateral triangle")
elif s1==s2 or s2==s3 or s3==s1:
  print("It is an isosceles triangle")
elif s1!=s2 and s2!=s3 and s3!=s1:
  print("It is a scalene")
else:
  print("It is not a triangle")
