table
{
    margin: auto;
    border-collapse: collapse;
}
td
{
    border: 1px solid black;
    padding: 5px;
}
.center
{
    text-align: center;
}
.ins
{
    text-decoration: underline;
}
.italic
{
    font-style: italic;
}
.gras
{
    font-weight: 700;
}
.bord
{
    border: 2px solid black;
}