input: Write a function that takes a string and two integers (start and end indices) as input, and returns the slice of the string from the start index (inclusive) to the end index (exclusive).
  
  def slicing(string, start, end):
      return string[start:end]
  
  assert slicing("This is a slicing test", 8, 15)=="a slicing"
  assert slicing("Python programming", 7, 18)=="programming"
  assert slicing("Hello World", 0, 5)=="Hello"
  assert slicing("Data Science", 5, 12)=="Science"
  assert slicing("Machine Learning", 8, 20)=="Learning"
output: def slicing(string, start, end):
      return string[start:end]