bigProduct :: BigProduct
bigProduct = BigProduct 1   2  3  4  5
                        6   7  8  9 10
                        11 12 13 14 15
                        16 17 18 19 20
                        21 22 23 24 25
bigProduct :: BigProduct
bigProduct = BigProduct 1   2  3  4  5
                        6   7  8  9 10
                        11 12 13 14 15
                        16 17 18 19 20
                        21 22 23 24 25
bigProduct = BigProduct 1   2  3  4  5
                        6   7  8  9 10
                        11 12 13 14 15
                        16 17 18 19 20
                        21 22 23 24 25