<human>:  comparing lengths of two strings.
<bot>: Here is a Python function for comparing lengths of two strings

import re

def compare_lengths(s1, s2):
  """
  Compare lengths of two strings.

  >>> compare_lengths("hello", "hello")
  0
  >>> compare_lengths("hello", "world")
  1
  """
  return len(s1) - len(s2)

# Enter the strings
s1 = "hello"
s2 = "hello"

# Calling the function
print((compare_lengths(s1, s2)))

s1 = "hello"
s2 = "world"

# Calling the function
print((compare_lengths(s1, s2)))

#Example Output
# 0
# 0

#Remember to inspect code for bugs.