a {
    -webkit-flex-basis: 8.33333%;
        -ms-flex-preferred-size: 8.33333%;
            flex-basis: 8.33333%;
    -webkit-flex-basis: -webkit-calc(100% / 12 * 1);
        -ms-flex-preferred-size: calc(100% / 12 * 1);
            flex-basis: calc(100% / 12 * 1)
}
