In the left box, type a series of characters representing an ordered pattern. In the right box, type a series of words separated by spaces. The ⚙ button will let you know if the words match the pattern specified in the first box.
AAA
Ho Ho Ho
Match
AAA
Oh No No
No match
ABBA
Knowing Me Knowing You
No match
ABBA
Knowing Me Me Knowing
Match
Same drill as before, but this time omit the spaces in the right box. Hardcore.
hehe
redrumredrum
Match
jack
redrumredrum
No match
ACDC
I'mT.N.T.
Match