.a { -ms-grid-row: 5; -ms-grid-row-span: 1; -ms-grid-column: 1; -ms-grid-column-span: 5; grid-area: 5 / 1 / span 1 / span 5;}
.b { -ms-grid-row: 3; -ms-grid-row-span: 1; -ms-grid-column: 1; -ms-grid-column-span: 3; grid-area: span 1 / span 3 / 4 / 4;}
.c { -ms-grid-row: 2; -ms-grid-column: 2; grid-area: 2 / 2;}
.d { grid-area: "custom-ident";}
.e { -ms-grid-row: 2; -ms-grid-row-span: 1; -ms-grid-column: 2; -ms-grid-column-span: 6; grid-area: 2 / 2 / 3 / 8;}
.f { -ms-grid-row: 2; -ms-grid-row-span: 1; -ms-grid-column: 2; grid-area: 2 / 2 / 3;}
/* emit warning */.g { -ms-grid-row: 3; -ms-grid-column: 1; grid-area: 3 / 1; grid-row: 1; grid-column: 2;}
.h { -ms-grid-row: 3; -ms-grid-column: 1; grid-area: 3 / 1; -ms-grid-column-span: 4; grid-column: 1 / span 4;}
/* there should be no warning */.i { -ms-grid-row: 3; -ms-grid-column: 1; grid-area: 3 / 1; -ms-grid-column-span: 4; grid-column-end: span 4;}
.j { -ms-grid-row: 3; -ms-grid-column: 1; grid-area: 3 / 1; -ms-grid-row-span: 4; grid-row-end: span 4;}