dem23.n9

ans = 0
with open('N9.txt') as f:
    lines = f.readlines()
    for line in lines:
        a = [int(i) for i in line.split()]
        b = set(a)
        if len(b) + 1 != len(a):
            continue
        rep=-1
        for i in a:
            if a.count(i) == 2:
                rep = i
        S = sum(a) - 2 * rep
        if S <= 4 * 2 * rep:
            ans += 1
print(ans)