const countries = ['Finland', 'Sweden', 'Denmark', 'Norway', 'IceLand'] Используйте map, чтобы отфильтровать страну, начинающуюся с «E»;

const countries = [
    "Afghanistan",
    "Albania",
    "Algeria",
    "Andorra",
    "Angola",
    "Anguilla",
    "Antigua &amp; Barbuda",
    "Argentina",
    "Armenia",
    "Aruba",
    "Australia",
    "Austria",
    "Azerbaijan",
    "Bahamas",
    "Bahrain",
    "Bangladesh",
    "Barbados",
    "Belarus",
    "Belgium",
    "Belize",
    "Benin",
    "Bermuda",
    "Bhutan",
    "Bolivia",
    "Bosnia &amp; Herzegovina",
    "Botswana",
    "Brazil",
    "British Virgin Islands",
    "Brunei",
    "Bulgaria",
    "Burkina Faso",
    "Burundi",
    "Cambodia",
    "Cameroon",

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Function from Description: Generate a function just by describing what is needs to do. Choose of many programming languages.
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Time complexity: Get time complexity.
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