.space(@abbrev, @name, @prop, @size) {
  .space-@{abbrev}-@{name} {
    @{prop}: @size !important;
  }
  .space-@{abbrev}t-@{name},
  .space-@{abbrev}y-@{name} {
    @{prop}-top: @size !important;
  }
  .space-@{abbrev}r-@{name},
  .space-@{abbrev}x-@{name} {
    @{prop}-right: @size !important;
  }
  .space-@{abbrev}b-@{name},
  .space-@{abbrev}y-@{name} {
    @{prop}-bottom: @size !important;
  }
  .space-@{abbrev}l-@{name},
  .space-@{abbrev}x-@{name} {
    @{prop}-left: @size !important;
  }
}