Added 'aardvark'
Added 'aardwolf'
Does the trie contain 'aardvark'? Yes!
Does the trie contain 'giraffe'? No...
trie contents:

.a
..a
...r
....d
.....v
......a
.......r
........k
.....w
......o
.......l
........f
aardvark
aardwolf