GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
M := [ [1,2,4], [1,4,9], [2,3,5], [2,4,5], [3,6,7], [4,5,7], [4,6,7], [4,6,9], [5,6,8], [5,7,8], [6,8,9] ]; #ausgeschnitten: 3,5,6 iso := rec( ); mu := []; dim := 3;