import math
import sys
# n,m=list(map(int,input().split()))
d=dict()
n=int(input())
for i in range(n):
    k=input()
    if k not in d:
        d[k]=0
    else:
        d[k]=d[k]+1

slist = sorted(d.items(),key=lambda x :-x[1])
print(slist[0][0])

/**************************************************************
	Problem: 1760
	User: admin
	Language: Python
	Result: Accepted
	Time:45 ms
	Memory:34480 kb
****************************************************************/