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→{{header|Elena}}
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`-- (null)</pre>
=={{header|Elena}}==
ELENA
<lang elena>import system'routines;▼
▲import system'routines;
import extensions;
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{
var tree := Node.new(
new Node[]
Node.new("a", new Node[]
Node.new("b", new Node[]
Node.new("d")
Node.new("e")
console.writeTree(tree).readChar()
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| +---d
|
+---
</pre>
| |||