The Comma

The right middle finger is in charge of pressing the comma key. This is a downward reach.

Review of Reaches:

right-middle-UP -> o
left-middle-UP -> w
left-middle-DOWN -> x

right-middle-UP -> i
left-middle-UP -> e
left-middle-DOWN -> c
right-ring -> l
right-middle -> k
right-pointer -> j
right-pinky -> ;
left-pointer -> f
left-middle -> d
left-ring -> s
left-pinky -> a