There are four South American countries whose names begin with either "C" or "P": Chile, Peru, Colombia, and Paraguay. Let's break down their details below:

Chile: A long and narrow country located along the western edge of South America, bordered by Argentina to its east, Bolivia and Peru to its north, the Pacific Ocean to its west, and the Drake Passage to its south. Santiago is its capital city.

Peru: A country located in western South America, bordered by Ecuador to its north, Colombia to its east, Brazil to its southeast, Bolivia to its south, Chile to its southwest, and the Pacific Ocean to its west. Lima is the capital and largest city.

Colombia: A nation located in northern South America, situated in the Andean region, bordered by Venezuela to its east, Guyana to its southeast, Suriname to its south, Brazil to its southwest, Ecuador and Peru to its west, and the Caribbean Sea to its northwest. The capital is Bogotá.

Paraguay: A landlocked country located in central South America, surrounded by Argentina to its south and east, Brazil to its northeast, Uruguay and the Río de la Plata to its north, and Bolivia to its west. Asunción is both the capital and largest city.

I hope this information helps! If you need any further assistance, feel free to ask.
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