(read c
t=echo
e="$t -n"
f(){
for i in `seq 2 $c`
do
$e $1
done
$t
}
l=aabb
$e a$l
f $l
for i in {a,,,,a}b
do
$e $i
f aaab
done
$e a$l
f $l)|tr ab ' #'