// your code goes here
var swap = (function (name_a, name_b){
return function swp(){
let t = eval(name_a);
t_name = Object.keys({t})[0]
eval(name_a + " = " + name_b)
eval(name_b + " = " + t_name)
}})()
var x=4
var y=7
swap(Object.keys({x})[0],Object.keys({y})[0])
console.log(x)
console.log(y)
console.log("doesnt work")
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