need help creating a wordlist.

I am trying to crack my sisters ee router and the default password is made up of a 3 a 4 and a 5 letter word.
Heres some examples:

5-4-3
horse-duck-dog
route-know-apt
guest-mean-apt
nerve-pick-six
truck-rank-few

4-5-3
cash-sting-six
vase-boast-own
farm-blend-own
want-dwell-fit
curb-appal-top

4-3-5
wait-rob-weary

3-4-5
dog-duck-horse
ant-stab-ideal
cue-reply-such

3-5-4
gum-sleep-free
pea-share-nice
leg-draft-good
use-teach-thin
toe-guard-calm

5-3-4
alarm-rub-male
label-fan-cool

Its allways a mixture of 5 4 3, never 5 4 4 or 5 3 3.

So far I have seperate list's of all 3 , 4 and 5 letter words, but I dont know how to combine them correctly.
Do you know of any tools I can use to manipulate or combine wordlists?

Also do you think the dictionary attack is the most appropriate attack for this password?

thanks