input: Write a function to compute the sum of all values in a given dictionary where keys are strings and values are integers. The function should return the computed sum.
  assert compute_dict_sum({"a": 5, "b": 10, "c": 15})==30
  assert compute_dict_sum({"x": 1, "y": 2, "z": 3})==6
  assert compute_dict_sum({})==0
  assert compute_dict_sum({"one": 1, "two": 2, "three": 3, "four": 4})==10
  assert compute_dict_sum({"apple": 5, "banana": 7, "cherry": 9})==21
output: def compute_dict_sum(d):
      return sum(d.values())