I have an obj:

```
let obj = {
    1: 'one',
    2: 'two',
    3: 'three',
    7: 'seven'
}

```

Is there an opportunity to iterate it starting 3 position, like this:

```
for (let key = 3 in obj) {
     console.log(obj[key]) // An output will be 'three' and 'seven'
}

```

I need to do this by the fastest way, because an obj is very huge