n = int(input())
f = [input() for _ in range(n)]
# Continue your code here and print your final answer!
counts = {}
for l in f:
    if l in counts:
        counts[l] += 1
    else:
        counts[l] = 1

mk = ""
ma = -1
for k in counts:
    if counts[k] > ma or (counts[k] == ma and k < mk):
        mk = k
        ma = counts[k]

print(mk)