import csv
import math

with open('./../42.txt') as file:
    reader = csv.reader(file, delimiter=",", quotechar='"')
    words = list(reader)[0]

def wordValue(n):
    return sum([ord(i.lower())-96 for i in n])

def triangleBase(n):
    return (math.sqrt(8*n+1)-1)/2

result = 0
for i in words:
    n = wordValue(i)
    if triangleBase(n).is_integer():
        result+=1
print(result)

#inverse triangle: (sqrt(8*n+1)-1)/2