leetcode Question 42: Letter Combinations of a Phone Number. Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below.
The Battle of the Little Bighorn, known to the Lakota and other Plains Indians as the Battle of the Greasy Grass and commonly referred to as Custer's Last Stand, was an armed engagement between combined forces of the Lakota, Northern Cheyenne, and Arapaho tribes and the 7th Cavalry Regiment of the United States Army.
The rural town is best known as the location of the pivotal American Civil War engagement the Battle of Pea Ridge, or, as it is locally known, the Battle of Elkhorn Tavern, which took place approximately five miles east of the town. The site of the battle is preserved as the Pea Ridge National Military Park. The town's downtown business district is on the National Register of Historic Places and largely comprises commercial structures from the late 19th and early 20th centuries.