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  <title>JS Alphabet Pattern 29 - Try It</title>
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  <h1>Full symmetric square (E..A..E)</h1>
  <p>Edit <code>top</code> or <code>j &gt; i</code>, then click Run.</p>
  <pre id=output></pre>
  <script>(()=>{const t="A".charCodeAt(0),r="E".charCodeAt(0);function e(e){let o="";for(let n=r;n>=t;n--)o+=(n>e?String.fromCharCode(n):String.fromCharCode(e))+" ";for(let n=t+1;n<=r;n++)o+=(n>e?String.fromCharCode(n):String.fromCharCode(e))+" ";return o.trimEnd()}let o="";for(let n=r;n>=t;n--)o+=e(n)+"\n";for(let n=t+1;n<=r;n++)o+=e(n)+"\n";document.getElementById("output").textContent=o})()</script>
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JavaScript Alphabet Pattern 29 (Try It)