1graph G { 2 size="3,3" 3 ratio="fill" 4 node[shape="circle"] 5 edge[style="bold"] 6 a; 7 b; 8 c; 9 d; 10 e; 11 f; 12 g; 13 h; 14 i; 15 j; 16 17 c -- a[label="1"] 18 a -- b[color="gray",style="bold",weight=0] 19 f -- c[label="2"] 20 g -- f[label="3"] 21 f -- h[label="7"] 22 g -- d[label="4"] 23 b -- e[label="6"] 24 b -- d[label="5"] 25 e -- d[color="gray",style="bold",weight=0] 26 27 i -- j[label="8"] 28} 29