<p>Given two integers n and k, return <em>an array of all the integers of length </em><code>n</code><em> where the difference between every two consecutive digits is </em><code>k</code>. You may return the answer in <strong>any order</strong>.</p> <p>Note that the integers should not have leading zeros. Integers as <code>02</code> and <code>043</code> are not allowed.</p> <p> </p> <p><strong class="example">Example 1:</strong></p> <pre> <strong>Input:</strong> n = 3, k = 7 <strong>Output:</strong> [181,292,707,818,929] <strong>Explanation:</strong> Note that 070 is not a valid number, because it has leading zeroes. </pre> <p><strong class="example">Example 2:</strong></p> <pre> <strong>Input:</strong> n = 2, k = 1 <strong>Output:</strong> [10,12,21,23,32,34,43,45,54,56,65,67,76,78,87,89,98] </pre> <p> </p> <p><strong>Constraints:</strong></p> <ul> <li><code>2 <= n <= 9</code></li> <li><code>0 <= k <= 9</code></li> </ul>