vector<string> numbers = {
        "zero", 
        "one",
        "two",
        "three",
        "four",
        "five",
        "six",
        "seven",
        "eight",
        "nine",
        "ten",
        "eleven",
        "twelve",
        "thirteen",
        "fourteen",
        "fifteen",
        "sixteen",
        "seventeen",
        "eighteen",
        "nineteen",
        "twenty",
        "twenty one",
        "twenty two",
        "twenty three",
        "twenty four",
        "twenty five",
        "twenty six",
        "twenty seven",
        "twenty eight",
        "twenty nine"
    };