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<html><head><style> #main { width: 70px; height: 300px; border: 1px solid #c3c3c3; display: flex; flex-wrap: wrap; align-content: center;}#main div { width: 70px; height: 70px;}</style></head><body><h1>The align-content Property</h1><div id="main"> <div style="background-color:coral;"></div> <div style="background-color:lightblue;"></div> <div style="background-color:pink;"></div></div></body></html>