Given a binary `grid` where `0` represents water and `1` represents land. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. Delete all islands except their borders. A border is land adjacent to water. You may assume all four edges of the grid are surrounded by water.\n\n**Example 1:**\n```\nInput:\n[[0, 0, 0, 1, 1, 1],\n [0, 0, 0, 1, 1, 1],\n [1, 1, 1, 1, 1, 1],\n [1, 1, 1, 1, 1, 1],\n [1, 1, 1, 1, 1, 1]]\n\nOutput:\n[[0, 0, 0, 1, 1, 1],\n [0, 0, 0, 1, 0, 1],\n [1, 1, 1, 1, 0, 1],\n [1, 0, 0, 0, 0, 1],\n [1, 1, 1, 1, 1, 1]]\n```\n\n**Example 2:**\n```\nInput:\n[[1, 1, 1, 1, 1, 1],\n [1, 1, 1, 1, 1, 1],\n [1, 1, 1, 1, 1, 1],\n [1, 1, 1, 1, 1, 1],\n [1, 1, 1, 1, 1, 1]]\n\nOutput:\n[[1, 1, 1, 1, 1, 1],\n [1, 0, 0, 0, 0, 1],\n [1, 0, 0, 0, 0, 1],\n [1, 0, 0, 0, 0, 1],\n [1, 1, 1, 1, 1, 1]]\n```\n\n**Example 3:**\n```\nInput:\n[[1, 1, 1, 0, 1, 1, 1],\n [1, 1, 1, 0, 1, 1, 1],\n [1, 1, 1, 0, 1, 1, 1],\n [0, 0, 0, 0, 1, 1, 1],\n [1, 1, 1, 0, 1, 1, 1]]\n\nOutput:\n[[1, 1, 1, 0, 1, 1, 1],\n [1, 0, 1, 0, 1, 0, 1],\n [1, 1, 1, 0, 1, 0, 1],\n [0, 0, 0, 0, 1, 0, 1],\n [1, 1, 1, 0, 1, 1, 1]]\n```\n\nRelated questions:\n* https://leetcode.com/problems/number-of-islands

Given a binary grid where 0 represents water and 1 represents land. An island is surrounded by water and is formed by connecting adjacent lands horizontally or 