|   Ry--+---+---+---@   
|   X---+---+---@---@   
|   Ry--+---+---+---@   
|   X---+---@---+---@   
|   Ry--+---+---+---@   
|   X---+---+---@---@   
|   Ry--+---+---+---@   
|   X---@---+---+---@   
|   Ry--+---+---+---@   
|   X---+---+---@---@   
|   Ry--+---+---+---@   
|   X---+---@---+---@   
|   Ry--+---+---+---@   
|   X---+---+---@---@   
|   Ry--+---+---+---@   
|   X---@---+---+---@   
