Fill in the blanks below to complete the following Apache Spark program which computes the number of occurrences of each word in a file. For simplicity we assume that words only occur in lowercase, and there are no punctuation marks.

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JavaRDD textFile = sc.textFile("hdfs://..."); Integer> counts = JavaPairRDD new (s-> Arrays.asList(s.split(" "))._ ()) ).reduceByKey((a, b) -> a + b);