Here are the directional combos for every bar on level 50:

Bar 1 (all letters): 1 left, 3 right, 3 left, 1 right, 2 left, 5 right, 2 left, 1 right, 1 left, 2 right

Bar 2 (letter R): 1 left, 1 right, 2 left, 2 right, 1 left

Bar 3 (letter E): 1 right, 1 left, 3 right, 1 left, 1 right

Bar 4 (letter D): 1 right, 2 left, 2 right, 1 left, 1 right

Bar 5 (red/der): 2 right, 1 left, 1 right, 2 left, 1 right