.grdR12{
    grid-row: 1/2;
}
.grdR34{
    grid-row: 3/4;
}
.grdR23{
    grid-row: 2/3;
}
.grdR45{
    grid-row: 4/5;
}
.grdR56{
    grid-row: 5/6;
}
.grdc12{
    grid-column: 1/2;
}
.grdc23{
    grid-column: 2/3;
}
.grdc34{
    grid-column: 3/4;
}
.grdc45{
    grid-column: 4/5;
}
.grdc123{
    grid-column: 1/3;
}
.grdR46{
    grid-row: 4/6;
}
.grdR24{
    grid-row: 2/4;
}