PY
py
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def find_sub_strings(main_s : str, sub_s : str) -> int:
sub_sz = len(sub_s)
main_sz = len(main_s)
ans = 0
for index in range ( main_sz - sub_sz + 1 ):
if main_s[index : index + sub_sz] == sub_s:
ans += 1
return ans
n, k = map ( int, input().split() )
strings = []
vertical_chars = [[]] * n
for _ in range(n):
S = input()
strings.append(S)
for i in range(n):
vertical_chars[i].append(S[i])
criterion = input()
total = 0
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OUTPUT
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