let's reverse numbers and strings:
Q1: 5 7 1 4 2 8 reverse to
A1:
First insert delimiter every 5 tokens.
 5 7 1 4 2 | 8
Then reverse the preprocessed sequence.
 8 | 2 4 1 7 5
Then remove the delimiters. 
 8 2 4 1 7 5
``` output
 8 2 4 1 7 5

Q2: 1 3 1 4 reverse to
A2:
First insert delimiter every 5 tokens.
 1 3 1 4
Then reverse the preprocessed sequence.
 4 1 3 1
Then remove the delimiters. 
 4 1 3 1
``` output
 4 1 3 1

Q3: a d v a n c e d m i c r o d e v i c e s reverse to
A3:
First insert delimiter every 5 tokens.
 a d v a n | c e d m i | c r o d e | v i c e s
Then reverse the preprocessed sequence.
 s e c i v | e d o r c | i m d e c | n a v d a
Then remove the delimiters. 
 s e c i v e d o r c i m d e c n a v d a
``` output
 s e c i v e d o r c i m d e c n a v d a

Q4: 3 0 0 0 0 f e e t a b o v e reverse to
A4:
First insert delimiter every 5 tokens.
 3 0 0 0 0 | f e e t a | b o v e
Then reverse the preprocessed sequence.
 e v o b | a t e e f | 0 0 0 0 3
Then remove the delimiters. 
 e v o b a t e e f 0 0 0 0 3
``` output
 e v o b a t e e f 0 0 0 0 3

Q5: 7 7 m a s s a v e c a m b r i d g e m a 0 2 1 3 9 reverse to