$positions: absolute relative fixed static;

@each $position in $positions {
  .#{$position} { position: #{$position}; }

  @each $breakpoint in $breakpoints {
    $bp: nth($breakpoint, 1);
    $letters: nth($breakpoint, 2);

    @media #{$bp} {
      .#{$position}-#{$letters} { position: #{$position}; }
    }
  }
}