A five-letter code will be formed from the letters of the word KEYBOARD. These are
the conditions: If the first letter is a vowel, then the second letter must be K and the last
letter must be a vowel as well. If the first letter is a consonant, the second letter must
be a consonant and the last letter must be either O or A. If repetition of letters is not
allowed, in how many ways can this be done?
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ayan po na kita ko lang po iyan