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.
On the other side of the attack was Sitting Bull, the revered Lakota chief who had originally wanted peace at Little Bighorn. Custer, however, was determined to fight. Against the onrush of thousands of Lakota, Arapaho and Cheyenne warriors, Custer and all of his men were surrounded, overwhelmed and killed.