A simple test follows:

Hello, world!

Now perform functional test:

Filter 1:

1 2 3 4 5 6 0

Filter 2:

Four Fix

Map 1:

This is a test. One Two Three Four Fix b c d e f g a

Map 2:

this is a test. one two three four fix 1 2 3 4 5 6 0

Reduce:

, This is a test., One, Two, Three, Four, Fix, 1, 2, 3, 4, 5, 6, 0