*{
    box-sizing: border-box;
    margin: 70px;
}



.parent{
    display: flexbox;
    flex-direction: row;
    flex-wrap: wrap;
    height: 1px;
    justify-content: center;
    align-items: stretch;
}

.item1, .item2, .item3, .item4, .item5, .item6{
    border: 1px solid black;
    display: flex;
    margin-top: 50px;
    align-items: flex-end;
    width: 300px;
    text-align: center;
    line-height: 20px;
    height: 400px;
}


.item1{
    order: 1;
}

.item2{
    order: 1;
}

.item3{
    order: 1;
}

.item4{
    order: -1;
}

.item5{
    order: -1;
}

.contact{
    display: flexbox;
    flex-direction: row;
    flex-wrap: wrap;
    margin-left: auto;
    height: 1px;
    justify-content: center;
    align-items: stretch;
}