<1>    If one doctor doctors another doctor, does the doctor who doctors the doctor doctor the doctor the way the doctor he is doctoring doctors? Or does he doctor the doctor the way the doctor who doctors doctors? 

<2>  Lesser leather never weathered wetter weather better.

<3>  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?

<4>    She sells seashells on the seashore.
          The shells she sells are seashells, I'm sure.

<5>       While we were walking, we were watching window washers wash Washington's windows with warm washing water.

<6>    You've no need to light a night-light
          On a light night like tonight,
          For a night-light's light's a slight light,
          And tonight's a night that's light.
          When a night's light, like tonight's light,
          It is really not quite right
          To light night-lights with their slight lights
          On a light night like tonight.