n = int(input().strip())
shoes = []
count = 0
for i in range(n):
    a,b = map(int,input().strip().split())
    attributes = set()
    for j in range(b):
        attributes.add(input().strip())
    shoes.append(attributes)
for i in range(len(shoes)-1):
    for j in range(i + 1, len(shoes)):
        if len(shoes[i] & shoes[j]) > 0:
            count += 1
print(count)