Readability

def solve():
    text = "____"
    
    letters = sum(____ for c in text if c.isalpha())
    words = len(text.split())
    sentences = text.count(____) + text.count(____) + text.count(____)
    
    L = letters / words * ____
    S = sentences / words * ____
    index = ____ * L - ____ * S - ____
    grade = round(____)
    
    if grade < ____:
        print(____)
    elif grade >= ____:
        print(____)
    else:
        print(____)