从顶点A到其他各顶点的前一顶点分别为：

从顶点A到其他各顶点的前一顶点分别为：

Kết quả (Anh) 1:

From vertex a to all other vertices before the vertex are:

Kết quả (Anh) 2:

From the vertex A to the front of each other vertex of a vertex are as follows:

Kết quả (Anh) 3:

From the vertices of A to the other vertices of the other vertices, respectively: