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 First Battle of Lexington, also known as the Battle of the Hemp Bales or the Siege of Lexington, was an engagement of the American Civil War, occurring from September 12 to September 20, 1861, between the Union Army and the pro-Confederate Missouri State Guard, in Lexington, the county seat of Lafayette County, Missouri.