NRswitchg - For each v, complement the edges from N(v) to V(G)-N(v)-v.
NRswitchg [-lq] [infile [outfile]]
For each v, complement the edges from N(v) to V(G)-N(v)-v.
The output file has a header if and only if the input file does.
-l Canonically label outputs.
-q Suppress auxiliary information.