f = open('24-157.txt')
s = f.readline()
a = 'Z X C V B N M A S D F G H J K L Q W E R T Y U I O P'.split()
b=[0]*26
for i in range(2, len(s)-2):
    if s[i-1]==s[i-2]:
        a+=s[i]
        if s[i] in a:
            b[a.index(s[i])]+=1
print(a[b.index(max(b))], max(b))