Test instances for the phylogeny problem

Each file corresponds to one of the instances cited in C.C. Ribeiro and D.S. Vianna, 
"A GRASP/VND heuristic for the phylogeny problem using a new neighborhood structure"

Line 1: integer values of m (number of characters) and n (number of taxons)
Lines 2 to n+1: name of the taxon, followed by a sequence of m values associated to each of its characters