l
E
S eventy E ighty N inety
E its the first letter of the number sequence one, two three four five six seven Eight
C
e
E dEsEr....E
m
The next letter in the sequence AAAAA is 'E'. It is a vowel sequence.
E
l
u n p
The next letter in the sequence is T. The sequence follows the alphabetical order, but jumps around by alternating the location of the letters in the alphabet.
L
N Neptune planets out from Sun E is Earth, for example
the next letter would be 'b'
y