Egypt — nile borders (2): Sinai, SudanEgyptSudan — nile borders (5): Central African Republic, Egypt, Eritrea, Ethiopia, South SudanSudanSouth Sudan — nile borders (6): Central African Republic, DR Congo, Ethiopia, Kenya, Sudan, UgandaSouth SudanEthiopia — nile borders (6): Djibouti, Eritrea, Kenya, Somalia, South Sudan, SudanEthiopiaEritrea — nile borders (3): Djibouti, Ethiopia, SudanEritreaTogo — niger_delta borders (1): BeninTogoBenin — niger_delta borders (2): Nigeria, TogoBeninNigeria — niger_delta borders (2): Benin, CameroonNigeriaCameroon — niger_delta borders (5): Central African Republic, Congo, Equatorial Guinea, Gabon, NigeriaCameroonDjibouti — horn borders (3): Eritrea, Ethiopia, SomaliaDjiboutiSomalia — horn borders (3): Djibouti, Ethiopia, KenyaSomaliaKenya — horn borders (4): Ethiopia, Somalia, South Sudan, UgandaKenyaUganda — horn borders (3): DR Congo, Kenya, South SudanUgandaCentral African Republic — congo_basin borders (5): Cameroon, Congo, DR Congo, South Sudan, SudanCentral African RepublicDR Congo — congo_basin borders (5): Angola, Central African Republic, Congo, South Sudan, UgandaDR 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, NamibiaAngolaNamibia — zambezi borders (2): Angola, BotswanaNamibiaBotswana — zambezi borders (2): Namibia, ZimbabweBotswanaZimbabwe — zambezi borders (2): Botswana, MozambiqueZimbabweMozambique — zambezi borders (2): Zimbabwe, MadagascarMozambiqueMadagascar — zambezi borders (1): MozambiqueMadagascarSyria — levant borders (4): Iraq, Israel, Jordan, LebanonSyriaLebanon — levant borders (2): Israel, SyriaLebanonIsrael — levant borders (4): Jordan, Lebanon, Sinai, SyriaIsraelJordan — levant borders (5): Hejaz, Iraq, Israel, Najd, SyriaJordanIraq — levant borders (4): Jordan, Kuwait, Najd, SyriaIraqSinai — levant borders (2): Egypt, IsraelSinaiHejaz — arabia borders (3): Jordan, Najd, YemenHejazNajd — arabia borders (7): The Gulf States, Hejaz, Iraq, Jordan, Kuwait, Oman, YemenNajdKuwait — arabia borders (3): Iraq, Najd, The Gulf StatesKuwaitThe Gulf States — arabia borders (3): Najd, Oman, KuwaitThe Gulf StatesOman — arabia borders (3): The Gulf States, Najd, YemenOmanYemen — arabia borders (3): Hejaz, Najd, OmanYemen