题解 | 竞选社长
竞选社长
https://www.nowcoder.com/practice/45a30e3ef51040ed8a7674984d6d1553
n = input()
PA = 0
PB = 0
for i in n:
if i == "A":
PA += 1
elif i == "B":
PB += 1
if PA > PB:
print('A')
elif PA < PB:
print('B')
else:
print('E')
