from cs50 import get_string


s = get_string("Input: ")
lc = 0
wc = 0
sc = 0

for i in s:
    if i.isalpha():
        lc += 1
    #if i.isalpha():
        #lc += 1
    #if string.isalpha(i):
        #lc += 1
    elif i == ' ':
        wc += 1
    #elif i.isalpha(): #and not i.isspace():
        #wc += 1
    elif i == '.' or i == '!' or i == '?':
        sc += 1
    else:
        lc += 1
wc += 1


L = lc/wc * 100
S = sc/wc * 100
index = 0.0588*L - 0.296*S - 15.8

ir = round(index)

if ir < 1:
    print("Before Grade 1")
elif ir >= 16:
    print("Grade 16+")
else:
    print("Grade")
    print(ir)