count=0
for i in range(0, len(s)):
    if s[i] == "a" or s[i] == "e" or s[i] == "i" or s[i] == "o" or s[i] == "u":
        count += 1
print(count)        

3708a5505d5037abb923f09cef5242c769b78939
<mask token>

<mask token>
for i in range(0, len(s)):
    if s[i] == 'a' or s[i] == 'e' or s[i] == 'i' or s[i] == 'o' or s[i] == 'u':
        count += 1
print(count)

count = 0
for i in range(0, len(s)):
    if s[i] == 'a' or s[i] == 'e' or s[i] == 'i' or s[i] == 'o' or s[i] == 'u':
        count += 1
print(count)

count=0
for i in range(0, len(s)):
    if s[i] == "a" or s[i] == "e" or s[i] == "i" or s[i] == "o" or s[i] == "u":
        count += 1
print(count)        
