ALLOWED=("AA","AG","GC","GT","CA","CG","TT","TC ");
DISALLOWED=("AC","AT","GG","GA","CC","CT","TG","TA")

##</code><code>##

CTGTCAGCNNNCCGGTTTTCAAGNNGAGCACACACCAAAAATGCACCAAAGCTTNACATCCATACAAA

##</code><code>##

C
T 
GTCAGC 
NNN
C 
CG 
GTTTTCAAG 
NN
G 
AGCA 
CA 
CA 
C 
CAAAAA 
T 
GCA 
C 
CAAAGC 
TT 
N
A 
CA 
TC 
CA 
T 
A 
CAAA