insert A
print
insert G
insert T
insert C
insert AACT
insert AAGG
insert AACA
insert AGGT
insert AA
print
insert AGGT
print
insert AA
print
insert CT
print
insert ATC
insert ATCGTT
print 
insert AAAACCCTGCCC
print
insert AAAACCCTGCATGC
print lengths
print stats
