.col-md-1
.col-md-1
.col-md-1
.col-md-1
.col-md-1
.col-md-1
.col-md-1
.col-md-1
.col-md-1
.col-md-1
.col-md-1
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<div class="col-md-1 bg-light border py-2 mb-3 text-center">.col-md-1</div>
<div class="col-md-1 bg-light border py-2 mb-3 text-center">.col-md-1</div>
<div class="col-md-1 bg-light border py-2 mb-3 text-center">.col-md-1</div>
<div class="col-md-1 bg-light border py-2 mb-3 text-center">.col-md-1</div>
<div class="col-md-1 bg-light border py-2 mb-3 text-center">.col-md-1</div>
<div class="col-md-1 bg-light border py-2 mb-3 text-center">.col-md-1</div>
<div class="col-md-1 bg-light border py-2 mb-3 text-center">.col-md-1</div>
<div class="col-md-1 bg-light border py-2 mb-3 text-center">.col-md-1</div>
<div class="col-md-1 bg-light border py-2 mb-3 text-center">.col-md-1</div>
<div class="col-md-1 bg-light border py-2 mb-3 text-center">.col-md-1</div>
<div class="col-md-1 bg-light border py-2 mb-3 text-center">.col-md-1</div>
</div>
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<div class="col-md-2 bg-light border py-2 mb-3 text-center">.col-md-2</div>
<div class="col-md-2 bg-light border py-2 mb-3 text-center">.col-md-2</div>
<div class="col-md-2 bg-light border py-2 mb-3 text-center">.col-md-2</div>
</div>
<div class="row">
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<div class="col-md-3 bg-light border py-2 mb-3 text-center">.col-md-3</div>
<div class="col-md-3 bg-light border py-2 mb-3 text-center">.col-md-3</div>
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