(global-set-key (kbd "<C-up>") 'windmove-up)
(global-set-key (kbd "<C-down>") 'windmove-down)
(global-set-key (kbd "<C-left>") 'windmove-left)
(global-set-key (kbd "<C-up>") 'windmove-up)
(global-set-key (kbd "<C-down>") 'windmove-down)
(global-set-key (kbd "<C-left>") 'windmove-left)