-1 5 setyrange
-4.5 4 setxrange
/A {-4 4} def
/B {2 4} def
/C {3.5 4} def
/chaine 2 string def
/trace {
30 setlinewidth
[A B] ligne
blanc
.5 setlinewidth
[A B] (*-*) ligne
noir
currentlinecap chaine cvs C [2 dup] cctext
} def
setTimes
0 setlinecap
trace
0 -2 stranslate
1 setlinecap
trace
0 -2 stranslate
2 setlinecap
trace
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