Map reduce- Count of words starting with the letter a-z - mapreduce

Question

I would like to get the count of number of words that start with letter "a-z" for which 'am trying this code but its just printing the count of number of words starting with "z".
public void map(LongWritable key, Text value, Context context)
throws IOException, InterruptedException {
String line = value.toString();
StringTokenizer itr = new StringTokenizer(line);
while( itr.hasMoreTokens()){
String token= itr.nextToken();
if(token.startsWith("a-z")){
word.set("A_Count");
//word.set("Z_Count");
context.write(word, ONE);
}
}
}

Answer 1

I have tried this out and it runs fine.
public class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
private final IntWritable VALUE = new IntWritable(1);
private final Text KEY = new Text("COUNT");
public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
String line = value.toString();
StringTokenizer tokenizer = new StringTokenizer(line);
while (tokenizer.hasMoreTokens()) {
String token = tokenizer.nextToken();
if(token.startsWith("a-z")){
context.write(KEY, VALUE);
}
}
}
My reducer looks like
public class Reduce extends Reducer<Text, IntWritable, IntWritable, NullWritable> {
public void reduce(Text key, Iterable<IntWritable> values, Context context)
throws IOException, InterruptedException {
int sum = 0;
for (IntWritable val : values) {
sum += val.get();
}
context.write(new IntWritable(sum),NullWritable.get());
}
}