$string['stackBlock_jsxgraph_ref']='The jsxgraph-block only supports referencing inputs present in the same CASText section \'{$a->var}\' does not exist here.';
$string['stackBlock_jsxgraph_param']='The jsxgraph-block supports only these parameters in this context: {$a->param}.';
$string['stackBlock_parsons_width']='The width of a Parsons block must use a known CSS-length unit.';
$string['stackBlock_parsons_height']='The height of a Parsons block must use a known CSS-length unit.';