n, l = int(input()), 0
table = [0] * 26
while n > 0:
s = input()
l = l + len(s)
s = s.upper()
for c in s:
index = ord(c)
if 65 <= index <= 90:
table[index - 65] = table[index - 65] + 1
n = n - 1
while l > 0:
index = 0
for fre in table:
if fre == l:
print(chr(index + 65), table[index])
index = index + 1
l = l - 1
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