Burundi
It is bordered by Rwanda to the north , Tanzania to the east and southeast , and the Democratic Republic of the Congo to the west; Lake Tanganyika lies along its southwestern border . 
<triplet> Rwanda <subj> Tanzania <obj> shares border with <subj> Democratic Republic of the Congo <obj> shares border with <triplet> Tanzania <subj> Rwanda <obj> shares border with <subj> Democratic Republic of the Congo <obj> shares border with <triplet> Democratic Republic of the Congo <subj> Rwanda <obj> shares border with <subj> Tanzania <obj> shares border with