CoCalc -- RP2.g

GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

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M:=[[1,2,3],[1,2,5],[1,3,6],[1,4,5],[1,4,6],[2,3,4],[2,4,6],[2,5,6],[3,4,5],[3,5,6]];
G:=Group(());
iso:=rec();
mu:=[];
dim := 4;