Opening lead is A♦, ruffed by South.
You draw trumps, West having four and E pitching ♦s. You play three rounds of ♥s, East having two and pitching one more ♦.
What next?
Hint: This hand is has a unusual solution, and is more bemusing than anything else, but it would be interesting to see if someone can guess the layout.
After ruffing the opening ♦ lead, you cash 4 ♠s and 3 ♥s.. As Gszes points out, this squeezes RHO down to ♦K and 4 ♣s. If LHO is void in ♣s, when you cross to ♣A, it becomes apparent that your only chance is to duck a ♦.
Notice that to make the contract, you do not need to hold the ♣9 or ♣8, on this layout.
If RHO's original shape was 1264, it's harder to guess right.