from collections import defaultdict

groups = [l.strip().split("\n") for l in
          open("6.dat").read().strip().split("\n\n")]

gca, gcb = [], []
for g in groups:
  gl = len(g)
  seen = set()
  cca = 0
  ccb = defaultdict(int)
  for c in "".join(g):
    ccb[c] += 1
    if c not in seen:
      cca += 1
      seen.add(c)
  gca.append(cca)
  gcb.append(sum([v == gl for k, v in ccb.items()]))

print("a", sum(gca), "b", sum(gcb))