String[][] strs = {
{ "fred", "joe", "bob" },
{ "mary", "sally", "jane" },
{ "fido", "spot", "fluffly" }};
DataBag reducerBag = bf.newDefaultBag();
for (int i = 0; i < 3; i++) { // combiner loop
DataBag combinerBag = bf.newDefaultBag();
for (int j = 0; j < 3; j++) { // map loop
Tuple t = tf.newTuple(2);
t.set(0, i * 10 + j);