Tim had bought a box of alphabet blocks and got another set free of cost. Help him pair the alphabet blocks so that he could save one set for the reserves.</div> <div class="id-app-translated-desc" style="display:none">蒂姆曾买了一箱字母块,并得到了另一套免费的成本。帮他配对字母块,这样他可以节省一组用于储备。</div> <div class="show-more-end">