The pattern of given letter series is :-
t st
Using the same pattern, we will get complete letter series.
t st / t s t / t s t / t s t

The given letter series in below pattern.
cc a ccb
After completing the pattern, we will get complete letter series.
cc a ccb / c c accb / cc a c c b

The pattern of given letter series is :-
ZY X W
After using the pattern the complete letter series will be as below.
ZY X W / W X YZ / ZY X W / W X Y Z

As per given question, the letter series is following the below pattern.
b aa b
After using the pattern the complete letter series will be as below.
b aa b /ba a b / b a ab / b aab

The given letter series in below pattern.
mbb/m a a
After using the pattern the complete letter series will be as below.
mbb/m a a/mb b /m a a/ m bb

As per given question, the letter series is following the below pattern.
n n m m
The pattern n n m m is repeated.
Using the same pattern, we will get complete letter series.
n n m m/n n m m/n n mm/ n n m m

The given letter series in below pattern.
m op n
After completing the pattern, we will get complete letter series.
m op n /mo p n/ m o pn /mop n

Here the letter series is as follows :-
ncd/ dcn
After using the pattern the complete letter series will be as below.
ncd / dcn / ccd / dcn / ndd / dcn / ndd

As per given question, the letter series is following the below pattern.
a b a b c
After using the pattern the complete letter series will be as below.
a b a b c /bc bc a/ caca b

In each subsequent term the last letter becomes the first letter.
Using the same pattern, we will get next term of given letter series.
bcde ebcd debc cdeb bcde