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def count_vowels(test_str):
res = 0
vow_list = ['a', 'e', 'i', 'o', 'u']
for idx in range(1, len(test_str) - 1):
if test_str[idx] not in vow_list and (test_str[idx - 1] in vow_list or test_str[idx + 1] in vow_list):
res += 1
if test_str[0] not in vow_list and test_str[1] in vow_list:
res += 1
if test_str[-1] not in vow_list and test_str[-2] in vow_list:
res += 1
return (res)
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