With respect to the graph
Another concept central to an understanding of fractional isomorphism is that of the iterated degree sequence of a graph. Recall that the degree of a vertex $v\in G$ is the cardinality of its neighbor set: $d(v) = |N(v)|$. The degree sequence of a graph $G$ is the multiset of the degrees of the vertices, $d_1(G) = \{d(v) : v\in V (G)\}$.
Why is the blue vertices have degree sequence {3, 3, 4} and the yellow vertices have degree sequence {3, 4, 4, 4} ?.