import sys def doit(input): phrases = list(input.strip().split("\n")) sum = 0 for p in phrases: words = p.split() invalid = 0 for i in range(len(words)): for j in range(len(words)): if j <= i: continue if words[i] == words[j]: invalid += 1 if invalid == 0: sum += 1 return "%d" % sum input = sys.stdin.read() print(doit(input))