Hadoop wordcount error

My mapper code-

public class MapperClass extends Mapper<LongWritable, Text, Text, IntWritable> {
    @Override
    public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
        String ss = value.toString();
        for(String word : ss.split(" "))
        {
            context.write(new Text(word),new IntWritable(1));
        }
    }
}

My reducer code

public class ReducerClass extends Reducer<Text, IntWritable, Text, IntWritable> {

    @Override
    public void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
        int sum = 0;
        while(values.iterator().hasNext())
        {
            IntWritable i= values.iterator().next();
            sum++;
        }
        context.write(key, new IntWritable(sum));
    }
}

My output file is --

1   1       1   1     1   1     2   1     2   1       3    1

Why is it showing this type of output instead of the following?

1  2      2  2   3  1