The letter O for the month of October. March, april, may, june, july, august, september...
Check your list. Are you sure it's not m a m j j a s o?
Because in that case the next letter has to be n. N for November.
The answer to this parochial question is j.
The letters are the lower case versions of the initial letters of the months as they are named in English.
KL m N op Q rst U See the pattern, the answer is U
The number of letters between successive letters is increasing by 1 on each occasion. E (F,G) H (I,J,K) L (M,N,O,P) Q (R,S,T,U,V) W.....is the next letter
R All other brackets all have 3 steps between a letter to the next.
J. L. J. M. Gerwen has written: 'ELKE DAG EEN DRAADJE ..'
T (letters without curves)
N for november. The sequence starts with march.
n for November
u n p
The next letter in the sequence is M. The sequence follows the alphabetical order with a pattern of skipping letters.
J for Junebecause it goes January, February, March, April, May June!
J = Jupiter planets outward from Sun MVEMJSUNP
a
J for June, they are the months of the year. J January, F February, M March, A April, M May.
s o.
N Neptune planets out from Sun E is Earth, for example
d j f m a
the next letter would be 'b'