Hi, We have two ways to generate trees: geng n n-1 -c or gengtree. However, I found that the latter's encoding does not seem to be graph6. For example, gentreeg 6 gives me: EaYbN, :EaXeN, :EaXbN, :EaXaN, :EaWmN, :EaGaN, but I can't use them further. Is there any program that can convert them? Best wishes, Licheng.