q = int(input())
c0 = set()
c1 = set()
c2 = set()
ans = 0
for _ in range(q):
    A = list(map(int, input().split()))
    for a in A:
        if not a in c0:
            ans += 1
            c0.add(a)
    for i, j in [(0, 1), (1, 2), (2, 0)]:
        a, b = A[i], A[j]
        if a > b:
            a, b = b, a
        if not (a, b) in c1:
            ans -= 1
            c1.add((a, b))
    A.sort()
    A = tuple(A)
    if not A in c2:
        ans += 1
        c2.add(A)

print(ans)