function task1(str){
    return str.replace(/(\.\.\.|\.|\?|\!)/g, "$1\n");
}

function task2(str){
    return str.replace(/(редиск(а|и|у|е|ой)|нехорош(ий|его|ему|им|ем) человек(а|у|е|ом)?)/g, "*давайте жить дружно*");
}

function task3(str){
    if(str.length > 5)
        if(/([a-z]+[A-Z]+[0-9]+[\.\?\!]+|[a-z]+[A-Z]+[\.\?\!]+[0-9]+|[a-z]+[0-9]+[A-Z]+[\.\?\!]+|[a-z]+[0-9]+[\.\?\!]+[A-Z]+|[a-z]+[\.\?\!]+[A-Z]+[0-9]+|[a-z]+[\.\?\!]+[0-9]+[A-Z]+|[A-Z]+[a-z]+[0-9]+[\.\?\!]+|[A-Z]+[a-z]+[\.\?\!]+[0-9]+|[A-Z]+[0-9]+[a-z]+[\.\?\!]+|[A-Z]+[0-9]+[\.\?\!]+[a-z]+|[A-Z]+[\.\?\!]+[a-z]+[0-9]+|[A-Z]+[\.\?\!]+[0-9]+[a-z]+|[0-9]+[a-z]+[A-Z]+[\.\?\!]+|[0-9]+[a-z]+[\.\?\!]+[A-Z]+|[0-9]+[A-Z]+[a-z]+[\.\?\!]+|[0-9]+[A-Z]+[\.\?\!]+[a-z]+|[0-9]+[\.\?\!]+[a-z]+[A-Z]+|[0-9]+[\.\?\!]+[A-Z]+[a-z]+|[\.\?\!]+[a-z]+[A-Z]+[0-9]+|[\.\?\!]+[a-z]+[0-9]+[A-Z]+|[\.\?\!]+[A-Z]+[a-z]+[0-9]+|[\.\?\!]+[A-Z]+[0-9]+[a-z]+|[\.\?\!]+[0-9]+[a-z]+[A-Z]+|[\.\?\!]+[0-9]+[A-Z]+[a-z]+)/.test(str))
            return "Сложной пароль";

    return "Простой пароль";
}

function task4(str){
    var date = str.match(/((0?[1-9]|[12]?[0-9]|3[01])\.(0?[1-9]|1[0-2])\.([0-9]{4}|[0-9]{2}))/g);
    str = "";
    for(let i = 0; i < date.length; i++)
        str += date[i].replace(/([0-9]+)\.([0-9]+)\.([0-9]+)/, "$3-$2-$1") + "\n";

    return str;
}