def trinum(x):
  if x == 1:
    return True
  x *= 2
  sqr = int(x ** 0.5)
  if x == sqr * (sqr + 1):
    return True
  else:
    return False

filein = open('words.txt', 'r')
names = filein.read().split(',')
for ii in xrange(len(names)):
  names[ii] = names[ii][1:-1]

def score(nn):
  mark = 0
  for i in nn:
    mark += ord(i) - ord('A') + 1
  return mark


count = 0
for i in names:
  if trinum(score(i)):
    #print '%3d\t' % score(i), i
    count += 1

print count