def convert(number):
    raindrop_sound: str = ""
    if not number % 3:
        raindrop_sound += "Pling"
    if not number % 5:
        raindrop_sound += "Plang"
    if not number % 7:
        raindrop_sound += "Plong"
    if raindrop_sound == "":
        raindrop_sound = str(number)
    return raindrop_sound