function Human(name, age, sex){
this.name = name;
this.age = age;
this.sex = sex;
this.toString = function(){
return this.name + " is " + this.age + " years old";
};
}
var james = new Human(\'James\', 21, \'male\');
var jessie = new Human(\'Jessie\', 12, \'male\');
console.log(james.toString());
console.log(jessie.toString());