text_plain_output_1.png
s = ''
for i in range(10):
    t = input('Enter a letter: ')
    if t == 'a' or t == 'e' or t == 'i' or (t == 'o') or (t == 'u'):
        s = s + t

s = input('Enter a string')

s = input('Enter some text: ')
for i in range(len(s)):
    if s[i] == 'a':
        print(i)