longclaps

xy = ({""}, {""})
for _ in range(int(input())):
    for i, t in enumerate(input().split()):
        xy[i].add(t)
print(max(map(len, xy)) // 2)

SELECT A.tovar_id FROM `таблица` AS A
                  JOIN `таблица` AS B
    ON A.tovar_id = B.tovar_id
    WHERE A.data = "data6" AND B.data = "data7";

def do(a):
    a -= 1
    if kkk[a]:
        return
    kkk[a] = 1
    for b in arr[a]:
        do(b)

n = int(input())
arr = []
kkk = [0] * n
for i in range(n):
    arr.append(list(map(int, input().split())))
do(1)
print(sum(kkk))

s = "здесь есть знаки препинания?"
print(any(c in ".!?" for c in s))

import re
s = 'привет. 123,56    !  78'
print(re.sub(r'([.,!?])', r' \1 ', s))  # добавляет пробелы
print(re.sub(r' *([.,!?]) *', r' \1 ', s))  # оставляет ровно по одному пробелу до/после

old_print = print

def print(*args, **kwargs):
    old_print("~", *args, "~", **kwargs)

print("qwerty")

from traceback import format_exc

try:
    # do something wrong
    x = 1 / 0
except:
    for s in format_exc().splitlines():
        print("*", s, "*")

class Node(object):
    def __init__(self, value, next_node=None):
        self.next_node = next_node
        self.value = value

    def is_circular(self):
        head, visited = self, set()
        while head is not None:
            i = id(head)
            if i in visited:
                return True
            visited.add(i)
            head = head.next_node
        return False