digraph G { node [shape=circle]; 0 -> 1 [label="λ"]; 1 -> 2 [label="λ"]; 2 -> 3 [label="λ"]; 3 -> 4 [label="λ"]; 4 -> 5 [label="λ"]; 5 -> 6 [label="λ"]; 6 -> 7 [label="λ"]; 1 -> 0 [label="μ"]; 2 -> 1 [label="2μ"]; 3 -> 2 [label="3μ"]; 4 -> 3 [label="3μ"]; 5 -> 4 [label="3μ"]; 6 -> 5 [label="3μ"]; 7 -> 6 [label="3μ"]; 0 [label="0"]; 1 [label="1"]; 2 [label="2"]; 3 [label="3"]; 4 [label="4", style="filled"]; 5 [label="5", style="filled"]; 6 [label="6", style="filled"]; 7 [label="7", style="filled", color="red"]; rankdir=LR; }