#Problem        : Birthday Cake
#Language       : Python 3
#Compiled Using : py_compile
#Version        : Python 3.4.3
#Input for your program will be provided from STDIN
#Print out all output from your program to STDOUT

import sys

data = sys.stdin.read().splitlines()

n = int(data[0])

a = data[1:]

st = set()
vt = []





#Problem        : Birthday Cake
#Language       : Python 3
#Compiled Using : py_compile
#Version        : Python 3.4.3
#Input for your program will be provided from STDIN
#Print out all output from your program to STDOUT

import sys

data = sys.stdin.read().splitlines()

n = int(data[0])

a = data[1:]

st = set()
vt = []





#Problem        : Birthday Cake #Language       : Python 3 #Compiled Using : py_compile #Version        : Python 3.4.3 #Input for your program will be provided from STDIN #Print out all output from your program to STDOUT