Im a beginner to python and I am wondering whether I can add a "+1" to my s.replace function

```
def growth(word, letter):
  result = ""
  for x in range(len(word)):
    for j in range(x + 1):
      result = word.replace(letter,letter + "*")
  return result

print(growth('hello', 'l'))

```

that is my code above and when I do run this code I get the value of `hel*l*o`
I am expecting this answer but I want to find a way to double it every time the letter "l" or whatever is set shows up.

Thank you