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Tree before operation
==================== Tree ====================
root
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==============================================
Tasks should be removed in this order: ['22', '42', '37', '35', '32', '16', '8', '20', '27', '25', '3', '17', '19', '38', '12', '15', '9', '10', '30', '33', '13', '24', '28', '2', '23', '7', '4', '39', '1', '11', '26', '29', '6', '31', '14', '40', '34', '41', '21', '18', '36', '5']
==================== Tree ====================
root
==============================================
Tree after operation
==================== Tree ====================
root
==============================================
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