题目：

s = list(input())
s.sort()
l, r1, r2 = 0, 'a', 0
for x in range(1,len(s)):
    if s[x] != s[l]:
        if x-l > r2:
            r2 = x-l
            r1 = s[x-1]
        l = x
print(r1)
print(r2)