Mauritania — sahel borders (2): Mali, SenegalMauritaniaMali — sahel borders (6): Burkina Faso, Guinea, Ivory Coast, Mauritania, Niger, SenegalMaliNiger — sahel borders (5): Benin, Burkina Faso, Chad, Mali, NigeriaNigerChad — sahel borders (4): Cameroon, Central African Republic, Niger, NigeriaChadBurkina Faso — sahel borders (6): Benin, Ghana, Ivory Coast, Mali, Niger, TogoBurkina FasoSenegal — guinea_coast borders (3): Guinea, Mali, MauritaniaSenegalGuinea — guinea_coast borders (5): Ivory Coast, Liberia, Mali, Senegal, Sierra LeoneGuineaSierra Leone — guinea_coast borders (2): Guinea, LiberiaSierra LeoneLiberia — guinea_coast borders (3): Guinea, Ivory Coast, Sierra LeoneLiberiaIvory Coast — guinea_coast borders (5): Burkina Faso, Ghana, Guinea, Liberia, MaliIvory CoastGhana — guinea_coast borders (3): Burkina Faso, Ivory Coast, TogoGhanaTogo — niger_delta borders (3): Benin, Burkina Faso, GhanaTogoBenin — niger_delta borders (4): Burkina Faso, Niger, Nigeria, TogoBeninNigeria — niger_delta borders (4): Benin, Cameroon, Chad, NigerNigeriaCameroon — niger_delta borders (6): Central African Republic, Chad, Congo, Equatorial Guinea, Gabon, NigeriaCameroonDjibouti — horn borders (1): SomaliaDjiboutiSomalia — horn borders (2): Djibouti, KenyaSomaliaKenya — horn borders (3): Somalia, Tanzania, UgandaKenyaUganda — horn borders (4): DR Congo, Kenya, Rwanda, TanzaniaUgandaCentral African Republic — congo_basin borders (4): Cameroon, Chad, Congo, DR CongoCentral African RepublicDR Congo — congo_basin borders (8): Angola, Burundi, Central African Republic, Congo, Rwanda, Tanzania, Uganda, ZambiaDR CongoCongo — congo_basin borders (5): Angola, Cameroon, Central African Republic, DR Congo, GabonCongoGabon — congo_basin borders (3): Cameroon, Congo, Equatorial GuineaGabonEquatorial Guinea — congo_basin borders (2): Cameroon, GabonEquatorial GuineaAngola — congo_basin borders (3): Congo, DR Congo, ZambiaAngolaRwanda — great_lakes borders (4): Burundi, DR Congo, Tanzania, UgandaRwandaBurundi — great_lakes borders (3): DR Congo, Rwanda, TanzaniaBurundiTanzania — great_lakes borders (7): Burundi, DR Congo, Kenya, Malawi, Rwanda, Uganda, ZambiaTanzaniaZambia — great_lakes borders (4): Angola, DR Congo, Malawi, TanzaniaZambiaMalawi — great_lakes borders (2): Tanzania, ZambiaMalawi