align items in row css

1.primary-nav {
2    display:-webkit-flex;
3    display:flex;
4    list-style-type:none;
5    padding:0;
6    justify-content:flex-end;
7}
8
9.left {
10    margin-right:auto;
11}

1.parent {
2  display: flex;
3  justify-content: space-between;
4}