while True:
try:
n = int(input())
for i in range(n):
s = str(input())
c = {} # 用dict储存每个字母对应的出现次数
for i in s:
#直接用count函数来输出字母出现的字数
c[i] = s.count(i)
out = sorted(list(c.values()), reverse=True)
m = 26
beauty = 0
for i in out:
beauty += m * i
m -= 1
print(beauty)
except:
break



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