# 24(32) РТ

f = open(r"C:\Users\SnowDrit\Downloads\24\24.32.txt")
s = f.readline()
s = s.replace('B', 'D')
s = s.replace('C', 'D')
s = s.replace('E', 'A')
for i in range(1, 100):
    if 'DA' * i in s:
        print(i)
# 24(32) РТ