#python解法
while True:
try:
n = int(input())
for i in range(n):
s = input()
dic_s = {}
for i in s:
#计算字符串中各个字母出现的次数并存放在字典中
if i not in dic_s:
dic_s[i] = 1
else:
dic_s[i] += 1
#对字典按照字母出现的次数从大到小排序
m = sorted(dic_s.items(),key = lambda x:-x[1])
n,index = 0,0
for i in m:
n = n + i[1] * (26-index)
index += 1
print(n)
except:
break 
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