In the previous lessons, you had to make an
array of numbers from `1`

to the last
day of the month:

`let arr = range(getLastDay(year, month));`

Also you have the number of the day of the week for the first day of the month and for the last:

```
let firstWeekDay = getFirstWeekDay(year, month);
let lastWeekDay = getLastWeekDay(year, month);
```

Let's now supplement our array with empty strings
on the right and left. Let for this we have the
`normalize`

function, as the first parameter
accepting an array, as the second - how many empty
strings to add on the left, and the third - how
many empty strings on the right:

```
function normalize(arr, left, right) {
}
```

I remind you that on the left we must add
`firstWeekDay`

empty elements, and on
the right - `6`

minus `lastWeekDay`

elements. That is, we will use our
`normalize`

function like this:

```
let res = normalize(arr, firstWeekDay, 6 - lastWeekDay);
console.log(res);
```

Implement the described `normalize`

function and check its operation.