class Man {
    var name: String
    var country: String

    init(_ name: String = "unknown",
        country: String = "unknown") {
        self.name = name
        self.country = country
    }
}

let man1 = Man()
//man1.name is "unknown"
//man1.country is "unknown"

let man2 = Man("Vladimir")
//man2.name is "Vladimir"
//man2.country is "unknown"

let man3 = Man(country: "Russia")
//man3.name is "unknown"
//man3.country is "Brazil"

let man4 = Man("Vladimir", country: "Russia")
//man4.name is "Vladimir"
//man4.country is "Brazil"


print(man1.name + "; " + man1.country + "\n")
print(man2.name + "; " + man2.country + "\n")
print(man3.name + "; " + man3.country + "\n")
print(man4.name + "; " + man4.country + "\n")