extracting from a string

How do I extract 5th to 10th characters of string as given below stored in a shell variable.

"ab cd ef gh ij kl"

How is cut to be used on this?
Thanks for any help.

VAR1="ab cd ef gh ij kl"
VAR2=`echo $VAR1 | cut -c5-10`

echo $VAR1
echo $VAR2

Cheers,

Keith