def beauty_strings(n,strings):
dic = {}
sum_1 = 0
c = []
a = len(set(strings))
for i in strings:
dic[i] = dic.get(i,0) + 1
for i,j in sorted(dic.items(),key=lambda x:-x[1]):
c.append(j)
for i,j in zip(range(26,26-a,-1),c):
sum_1 += i*j
print(sum_1)
n = int(input().strip())
for i in range(n):
strings = input().strip()
beauty_strings(n,strings)



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