Ben and Sam wanted to watch a Swansea City match. While they are on their way to the ticket booth, they came across a stall. In the stall there are 3 envelopes on the table, each with a label. The labels are: "2 Swansea City match tickets", "2 pieces of blank paper" and "A Swansea City match ticket, A piece of blank paper". The stall owner told them that none of the labels are correct and they can only take one paper/ticket out of one of the envelopes, then decide which envelope to take. Which envelope should they take a paper/ticket out, so they get 2 Swansea City match tickets?