digraph SpanMap {
node [shape=box, width=0.3, height=0.3]
nodesep=.05

map [shape=record, width=6, label="<f0>|<f1>|<f2>|<f3>|<f4>|<f5>|<f6>|<f7>|<f8>|<f9>|<f10>"]
S0 [label="a"]
S1 [label="b"]
S2 [label="c"]
S3 [label="d"]
map:f0 -> S0
map:f1 -> S0
map:f2 -> S1
map:f3 -> S2
map:f4 -> S2
map:f5 -> S2
map:f6 -> S2
map:f7 -> S2
map:f8 -> S3
map:f9 -> S3
map:f10 -> S3

}