B"Fox Ciel starts to learn programming. The first task is drawing a fox! However, that turns out to be too hard for a beginner, so she decides to draw a snake instead. A snake is a pattern on a n by m table. Denote c-th cell of r-th row as (r, xe2 x80 x89c). The tail of the snake is located at (1, xe2 x80 x891), then it's body extends to (1, xe2 x80 x89m), then goes down 2 rows to (3, xe2 x80 x89m), then goes left to (3, xe2 x80 x891) and so on. Your task is to draw this snake for Fox Ciel: the empty cells should be represented as dot characters ('.') and the snake cells should be filled with number signs ('#'). Consider sample tests in order to understand the snake pattern. The only line contains two integers: n and m (3 xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89n, xe2 x80 x89m xe2 x80 x89 xe2 x89 xa4 xe2 x80 x8950). n is an odd number. Output n lines. Each line should contain a string consisting of m characters. Do not output spaces."...