Time series prediction numberformatexception

I am following the example of SingleTimestepRegressionExample.
I have just updated the passengers_train_0.csv and passengers_test_0
with data like 10 20 30 40 50 60 …like passenger data .

But when running the program ,I am getting exception.

Exception in thread “main” java.lang.NumberFormatException: For input string: “10"”
at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043)
at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
at java.lang.Double.parseDouble(Double.java:538)
at org.datavec.api.writable.Text.toDouble(Text.java:593)
at org.deeplearning4j.datasets.datavec.RecordReaderMultiDataSetIterator.convertWritablesSequence(RecordReaderMultiDataSetIterator.java:634)
at org.deeplearning4j.datasets.datavec.RecordReaderMultiDataSetIterator.convertFeaturesOrLabels(RecordReaderMultiDataSetIterator.java:306)
at org.deeplearning4j.datasets.datavec.RecordReaderMultiDataSetIterator.nextMultiDataSet(RecordReaderMultiDataSetIterator.java:264)
at org.deeplearning4j.datasets.datavec.RecordReaderMultiDataSetIterator.next(RecordReaderMultiDataSetIterator.java:211)
at org.deeplearning4j.datasets.datavec.SequenceRecordReaderDataSetIterator.next(SequenceRecordReaderDataSetIterator.java:345)
at org.deeplearning4j.datasets.datavec.SequenceRecordReaderDataSetIterator.next(SequenceRecordReaderDataSetIterator.java:324)
at org.deeplearning4j.datasets.datavec.SequenceRecordReaderDataSetIterator.next(SequenceRecordReaderDataSetIterator.java:32)
at org.rurik.neuronet.SingleTimestepRegressionExample.main(SingleTimestepRegressionExample.java:68)