f = open("24.txt").readline()

f = f.replace('A','A ').replace('B','B ').split(' ')

maxi = 0

for i in range(len(f)-2):

c = f[i] + f[i+1]+ f[i+2][:-1]

if c.count('A') == 1 and c.count('B') == 1:

maxi= max(maxi, len(c))

c = f[-3] + f[-2]+ f[-1]

if c.count('A') == 1 and c.count('B') == 1:

maxi= max(maxi, len(c))

print(maxi)

f = open('24.txt').readline()

maxi = 0

for i in range (0,len(f)):

cnt=0

a = 0

b = 0

for j in range (i,len(f)):

cnt += 1

if f[j] == 'A':

a += 1

if f[j] == 'B':

b += 1

if a >= 2 or b >= 2:

if (a==2 and b==1) or (a==1 and b==2):

maxi = max(cnt-1,maxi)

break

print(maxi)

s = open('24.txt').readline()

p = [-1]+[i for i in range(len(s)) if s[i] in 'AB'] + [len(s)]

print(max([p[i+3]-p[i]-1 for i in range(len(p)-3) if s[p[i+1]] != s[p[i+2]]]))