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 <span style="color: #004080;">sequence</span> <span style="color: #000000;">xyz</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">x</span><span style="color: #0000FF;">),</span><span style="color: #000000;">y</span><span style="color: #0000FF;">),</span><span style="color: #000000;">z</span><span style="color: #0000FF;">)</span>
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