Can you say this tongue twister? 
TRY IT!

Peter Piper picked a peck of pickled peppers.
Did Peter Piper pick a peck of pickled peppers?
If Peter Piper Picked a peck of pickled peppers,
Where's the peck of pickled peppers Peter Piper picked?
Very difficult to say, isn't it? Try this week's they are easier:

PUT THE PEN AND THE PENCIL IN THE PENCIL CASE.

THE STRANGE SERPENT WITH SMALL SPOTS AND SLIMY SKIN SLEEPS BY THE LAKE.