Untitled

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>TARGIL</title>
    <style>
        * {

            padding: 0;
            margin: 0;
        }

        div img[src~="th"] {
            display: block;

        }

        div img:hover[src~="big"] {
            display: none;

        }
    </style>

</head>

<body>
    <div>
        <img src="th cats.jpg" alt="small cat">
        <img src="th cats2.jpg" alt="small cat">
        <img src="th cat 3.jpg" alt="small cat">
        <img src="th cats 4.jpg" alt="small cat">
        <img src="big cats.jpg" alt="big cats">
        <img src="big cats 2.jpg" alt="big cats">
        <img src="big cat 3.jpg" alt="big cats">
        <img src="big cats 4.jpg" alt="big cats">
    </div>

</body>

</html>