GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
1 prime 2 class 1 generators {a, b} relations {a^4 = [b, a, a, a, a, a], b * a^2 * b^-1 * a^-2 = [b, a, a, a, a, a], b^2 = [b, a, a, a, a, a]} ; 2 #standardise CLASS8 #file 8 #class 2 #nmr of auts 0 1 1 1 0 1 1 0 1 #PAG-generating sequence 0