24 (макс кол-во букв после A)

#https://inf-ege.sdamgia.ru/problem?id=55611
data = open('24 (1).txt').readlines()
CNT = {}
for e in data:
    cnt = {}
    for i in range(1, len(e)):
        if e[i - 1] == 'A':
            if e[i] not in cnt:
                cnt[e[i]] = 0
            cnt[e[i]] += 1
    mx = max(cnt.values())
    for c in cnt:
        if cnt[c] == mx:
            if c not in CNT:
                CNT[c] = 0
            CNT[c] += 1
print(max(CNT.values()))