Syntax error in if line

[daniel]

Thank you very much. As a matter of fact, I use Python 3.6.2. When I fixed the line 1 I got another error in line 4

lazy = int(input("How lazy are you? (write number 1-100) "))
if lazy < 20:
   print("Go RUN RUN RUN")
elif < 45:
   print("we can still go running, let's grab something and go")
elif < 70:
   print("okay, let's just go for a walk")
elif <= 100:
   print("Hm, let's just grab some nice coffee")
else:
   print("hey, that's too much lazy, you were supposed to be max lazy 100, you lazy girl!")

Error:
File "D:\Python\Inge.py", line 4
   elif < 45:
        ^
SyntaxError: invalid syntax