class Solution {
    public String solution(String sentence) {
         String answer = "";
         String sentence_lowerCase = sentence.toLowerCase(); //to lower case alphabet

         String a = "abcdefghijklmnopqrstuvwxyz";
         String[] hits = {};
         //If input length is less than 26 then it can never be complete

        if(sentence_lowerCase.length() < 26)
        {
            return "FALSE";
        }

                for (char ch = 'A'; ch <= 'Z'; ch++)
        {
            if (sentence_lowerCase.indexOf(ch) < 0 && sentence_lowerCase.indexOf((char) (ch + 32)) < 0)
            {
                return "FALSE";
            }
        }
       answer = "perfect";


        return answer;
    }
}