static boolean isAnagram(String a, String b) {
    // Complete the function
    java.util.Map<Character, Integer> stringAMap = new java.util.HashMap<>();
    java.util.Map<Character, Integer> stringBMap = new java.util.HashMap<>();

    if(a.length() == b.length()) {
        for(int i = 0; i < a.length(); i++){
            stringAMap.compute(a.toLowerCase().charAt(i), (key, value) -> value == null ? 1 : value + 1);    
            stringBMap.compute(b.toLowerCase().charAt(i), (key, value) -> value == null ? 1 : value + 1);    
        }
        if(stringAMap.equals(stringBMap)){
            return true;
        }
        return false;

    }
    return false;
}