css multiple classes same rule

1To specify multiple classes, separate the class names with a space,
2e.g. <span class="classA classB">.
3This allows you to combine several CSS classes for one HTML element.

1.bucket1, .bucket2, .bucket3 {
2}
3
4.bucket4, .bucket5, .bucket6 {
5}
6

1.objectOne, .objectTwo { /* We will now both be changed */
2	margin: 0 auto; 
3}

1/*Here two ways are mentioned*/
2#one{
3    font-family: 'Impact';
4    color: red;
5    font-size: 25px;
6}
7#two{
8    font-family: 'Times New Roman';
9    color: blue;
10    font-size: 50px;
11}
12.three{
13    font-family: 'Impact';
14    color: red;
15    font-size: 25px;
16}
17.four{
18    font-family: 'Times New Roman';
19    color: blue;
20    font-size: 50px;
21}
22

1<div class="a-class another-class"></div>