<p>pointless…</p>
<p>dull…</p>
<p>my pencil…</p>
<p>mechanical…</p>
<p>geometric…</p>
<p>sequences…</p>
<p>Dna…</p>
<p>acidic…</p>
<p>litmus paper…</p>
<p>pH…</p>
<p>acid…</p>
<p>potential of hydrogen…</p>
<p>scale…</p>
<p>periodic table…</p>
<p>elements…</p>
<p>metals . .</p>
<p>iron . . .</p>
<p>curtain…</p>
<p>stage…</p>
<p>production…</p>