import sys

a, b, c = [], {}, []
[a.extend(i.split()) for i in sys.stdin] and a.remove(a[0])
for i in a:
    b[i] = b.get(i, 0) + 1
{c.append(i) for i, j in b.items() if j == max(b.values())} \
    and print(min(c), end='')