{category_a} + {category_b}
{category_a_and_b_words}
{category_a}
{category_a_words}
{category_b}
{category_b_words}
{category_a} + Not {category_b}
{category_a_vs_b_words}
{category_b} + Not {category_a}
{category_b_vs_a_words}
Not {category_b}
{not_category_b_words}
Not {category_a}
{not_category_a_words}
Not {category_a} + Not {category_b}
{not_category_a_and_b_words}