{"trustable":false,"sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003e\n The Weasely twins Fred and George have released a new product, the Multiplying Muffin, which, as the name suggests, creates multiple clones of a person who eats it. The clones are supposed to disappear after some time. But the twins made an error while baking the muffin, and the clones never seemed to disappear. So to rectify their mistake, they lined up the clones of all the people who ate the muffin and decided to perform the Evanesco spell to make them disappear manually.\n\u003c/p\u003e\n\u003cp\u003e\n As they always work together, they decided that they will only vanish a pair of adjacent clones of the same person. They stop doing the spell when they can\u0027t find any such pair, or when there are no more clones to vanish.\n\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003eThe only line contains string \u003ci\u003es\u003c/i\u003e denoting the sequence in which clones are lined up.\u003c/p\u003e\n\u003cp\u003e1 \u0026le; |s| \u0026le; 100\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003eOutput the sequence of clones remained after the twins stopped.\u003c/p\u003e\n\u003cp\u003eIf there are no clones left, output \u003ci\u003eEmpty String\u003c/i\u003e\u003c/p\u003e"}},{"title":"Sample","value":{"format":"HTML","content":"\u003cp\u003eInput\u003c/p\u003e\n\u003cp\u003eaa\u003c/p\u003e\n\u003cp\u003eOutput\u003c/p\u003e\n\u003cp\u003eEmpty String\u003c/p\u003e\n\u003cp\u003eInput\u003c/p\u003e\n\u003cp\u003eaabbba\u003c/p\u003e\n\u003cp\u003eOutput\u003c/p\u003e\n\u003cp\u003eba\u003c/p\u003e\n\u003cp\u003eInput\u003c/p\u003e\n\u003cp\u003eabccba\u003c/p\u003e\n\u003cp\u003eOutput\u003c/p\u003e\n\u003cp\u003eEmpty String\u003c/p\u003e"}}]}