Write a function to determine if two strings are anagrams of each other. An Anagram is a word or phrase that is formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once. ### Constraints: - 1 <= s.length, t.length <= 5 * 10^4 - s and t consist of lowercase English letters. ### Examples: 1. Input: s = "anagram", t = "nagaram" Output: true 2. Input: s = "rat", t = "car" Output: false