The vertex ids are different between input and output #11

Thank you very much for your open code! But these is something wrong when I try to use these code.

I use the edge list as the input of PGD as follow:

1 2
1 6
1 4
4 5
4 3
3 5

The output of the PGD is :

% src,dst,triangle,2-star,4-clique,4-chordal-cycle,4-tailed-triangle,4-cycle,3-star,4-path
6,5,1,0,0,0,0,0,0,0
5,4,1,1,0,0,0,0,0,0
6,4,1,1,0,0,0,0,0,0
2,1,0,2,0,0,0,0,1,0
3,1,0,2,0,0,0,0,1,0
4,1,0,4,0,0,0,0,2,4

It's easy to see that the vertex ids are different between input and output
So do you have any method to solve it ?

Best Regards