Betty
1. This clue might take you back to a more innocent age. Or not.
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2. Look at the keys with the numbers mentioned. They have something in common.
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3. At least the first five do. 9 is only sometimes considered to be one of them.
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4. Ignore the numbers and focus on the letters of these keys.
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5. Specifically one letter per key.
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6. Five letters, sometimes six, that have something in common.
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7. Or, as some of us learned in grade school, A-E-I-O-U and sometimes Y.
(SOLUTION FOLLOWS)
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8. They're vowels. Type VOWELS (869357).