@mp-list: margin m, padding p;

.loop-mp(@infix, @adKey, @adValue, @i: 1) when (@i =< length(@mp-list)) {
  @item: extract(@mp-list, @i);
  @abbrev: extract(@item, 2);
  @prop: extract(@item, 1);
  .@{abbrev}@{infix}  { @{prop}:        @adValue !important; }
  .@{abbrev}t@{infix} { @{prop}-top:    @adValue !important; }
  .@{abbrev}r@{infix} { @{prop}-right:  @adValue !important; }
  .@{abbrev}b@{infix} { @{prop}-bottom: @adValue !important; }
  .@{abbrev}l@{infix} { @{prop}-left:   @adValue !important; }
  .@{abbrev}x@{infix} {
    @{prop}-right: @adValue !important;
    @{prop}-left:  @adValue !important;
  }
  .@{abbrev}y@{infix} {
    @{prop}-top:    @adValue !important;
    @{prop}-bottom: @adValue !important;
  }

  .loop-mp(@infix, @adKey, @adValue, @i + 1);
}

.for-each(@spacings, {
  .infix-mixin(@adKey) when(@adKey = 0) {
    @infix: 0;
  }
  .infix-mixin(@adKey) when(default()) {
    @infix: ~"-@{adKey}";
  }
  .infix-mixin(@adKey);

  .loop-mp(@infix, @adKey, @adValue, 1);

});