"xvkbd -xsendevent -text "\[Alt_L]\[Left]""
  m:0x10 + b:8
"xvkbd -xsendevent -text "\[Alt_L]\[Right]""
  m:0x10 + b:9
"xvkbd -xsendevent -text "\[Alt_L]\[Left]""
  m:0x10 + c:234
"xvkbd -xsendevent -text "\[Alt_L]\[Right]""
  m:0x10 + c:233