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<Grid container rowSpacing={1} columnSpacing={{ xs: 1, sm: 2, md: 3 }}>
<Grid item xs={6}>
<Item>1</Item>
</Grid>
<Grid item xs={6}>
<Item>2</Item>
</Grid>
<Grid item xs={6}>
<Item>3</Item>
</Grid>
<Grid item xs={6}>
<Item>4</Item>
</Grid>
</Grid>