I'm glad the answer is obvious. Trick two, spade ruff. Trick three diamond. If they are 5-0, I will need 3-2 hearts. When everyone follows, draw trumps overtaking the second round. If diamonds are 4-1, revert to the "n & b" line :P. If diamonds are 3-2, claim. When hearts are 0-5 my tricks are five diamonds, two spades, two clubs and 4 hearts, but I needed some wasted effort at trick 2 to get to thirteen.