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1.
Mongolia borders North Korea
2.
The Democratic Republic of the Congo borders Namibia
3.
Guatemala borders Mexico
4.
Equatorial Guinea borders Nigeria
5.
Burkina Faso borders Senegal
6.
Tajikistan borders Turkmenistan
7.
Cameroon borders the Republic of the Congo
8.
Denmark borders Sweden
9.
Australia borders Papua New Guinea
10.
Panama borders Venezuela
11.
Slovakia borders Ukraine
12.
China borders Thailand
14.
Brazil borders Guyana
15.
Iceland borders Ireland