ДЗ 12 Н 2

text = list(map(str,input().split()))
s = list(set(text))
d = {}
s = sorted(s)
for i in range(len(s)):
    d[s[i]] = 0
for i in range (len(text)):
    d[text[i]] += 1
ms = list(d.values())
im = ms.index(max(ms))
print(s[im])