# 
class Directions:
    UP = 'up'
    DOWN = 'down'
    LEFT = 'left'
    RIGHT = 'right'
    STOP = 'stop'
    
    UP_T = 0, -1
    DOWN_T = 0, 1
    LEFT_T = -1, 0
    RIGHT_T = 1, 0
    STOP_T = 0, 0
    
    TUPS = {UP: UP_T,
          DOWN: DOWN_T,
          LEFT: LEFT_T,
          RIGHT: RIGHT_T,
          STOP: STOP_T}