Learn/C++/C++ Beginner/Programming Problem Solving/Checkpoint: Problem Solving/Anagram SignatureAnagram SignatureChallenge on lesson: Checkpoint: Problem SolvingInstructionsCodeOutputImplement signature(word): a lowercase sorted-letters key for a word ("Listen" and "Silent" share the key "eilnst"), and same_letters(a, b) comparing two words by signature.Difficulty: beginnerSubmitPress Submit to check your solution.Back to lesson: Checkpoint: Problem Solving