# Insert After Head
We have a string with an HTML Document.
Write a regular expression that inserts `Hello
` immediately after `` tag. The tag may have attributes.
For instance:
```js
let regexp = /your regular expression/;
let str = `
...
`;
str = str.replace(regexp, `Hello
`);
```
After that the value of `str` should be:
```html
Hello
...
```