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ProgramNode(0...9)( [:s], StatementsNode(0...9)( [LocalVariableWriteNode(0...9)( :s, 0, InterpolatedStringNode(4...9)( (4...9), [StringNode(10...17)(nil, (10...17), nil, "a\xE9b\n")], (17...21) ), (0...1), (2...3) )] ) )