B"Valera takes part in the Berland Marathon. The marathon race starts at the stadium that can be represented on the plane as a square whose lower left corner is located at point with coordinates (0, xe2 x80 x890) and the length of the side equals a meters. The sides of the square are parallel to coordinate axes. As the length of the marathon race is very long, Valera needs to have extra drink during the race. The coach gives Valera a bottle of drink each d meters of the path. We know that Valera starts at the point with coordinates (0, xe2 x80 x890) and runs counter-clockwise. That is, when Valera covers a meters, he reaches the point with coordinates (a, xe2 x80 x890). We also know that the length of the marathon race equals nd xe2 x80 x89+ xe2 x80 x890.5 meters. Help Valera's coach determine where he should be located to help Valera. Specifically, determine the coordinates of Valera's positions when he covers d, xe2 x80 x892 xc2 xb7d, xe2 x80 x89..., xe2 x80 x89n xc2 xb7d meters. The first line contains two space-separated real numbers a and d (1 xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89a, xe2 x80 x89d xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89105), given with precision till 4 decimal digits after the decimal point. Number a denotes the length of the square's side that describes the stadium. Number d shows that after each d meters Valera gets an extra drink. The second line contains integer n (1 xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89n xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89105) showing that Valera needs an extra drink n times. Print n lines, each line should contain two real numbers xi and yi, separated by a space. Numbers xi and yi in the i-th line mean that Valera is at point with coordinates (xi, xe2 x80 x89yi) after he covers i xc2 xb7d meters. Your solution will be considered correct if the absolute or relative error doesn't exceed 10 xe2 x80 x89- xe2 x80 x894. Note, that this problem have huge amount of output data. Please, do not use cout stream for output in this problem."...