imap <C-n> <Down>
 imap <C-p> <Up>
 imap <C-@> <C-Space>

noremap! <Leader>h <left>   "move cursor left
noremap! <Leader>j <down>   "move cursor down
noremap! <Leader>k <up>     "move cursor up
noremap! <Leader>l <right>  "move cursor right
noremap! <Leader>w <esc>wi  "move one word forward
noremap! <Leader>e <esc>ei  "move forward to the end of word
noremap! <Leader>b <esc>bi  "move one word backward