Mexico and Canada.
Mexico and Canada
Canada in the north and Mexico in the south have land borders with the US.
The USA shares land borders with Canada to the north and Mexico to the south.
Canada and Mexico
The only two countries with land borders with the US are Canada to the north and Mexico to the south.
As far as land borders, there are only two: Canada on the north and Mexico on the south.
Canada and Mexico
No continents. Two countries: Canada and Mexico
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Brazil borders all but two of the countries in South America.
Saudi Arabia and Oman.