n = int(input())

combinations = {}
maxcombi = 0
combinations[maxcombi] = 0

for _ in range(n):
    combi = "".join(sorted(input().strip().split()))
    if combi in combinations.keys():
        combinations[combi] += 1
        if combinations[maxcombi] < combinations[combi]:
            maxcombi = combi
    else:
        combinations[combi] = 1

max_value = combinations[maxcombi]
most_popular = sum(
    [max_value for key in combinations if combinations[key] == max_value]
)

print(most_popular if most_popular > 0 else len(combinations.keys()) - 1)