I will leave out the auction because it is too horrible to mention, but South ended up in diamonds after West showed the black suits.
Trick 1: ♠queen, ACE, x, x
Trick 2: ♦x, x, QUEEN, jack
Trick 3: ♦ACE, ♠x, ♥x, x
Trick 4: ♦ten, ♥x, ♣x, KING
Trick 5: ♥king, ACE, x, x
On the run of the diamonds it came down to this position:
Scoring: MP
Trumps: ♦
Lead: ♠Q
Trumps: ♦
Lead: ♠Q
And on the last diamond West didn't give up the spade suit so he pitched a low club while dummy threw a spade, and was thrown in with a low club after the spade finesse so declarer could score both black kings.
Is this a stepping stone squeeze or just a strip squeeze or is it some other kind? Declarer easily makes 11 tricks if a heart isn't played by East at trick 5.

Help

Trumps: ♦
Lead: ♠Q