bool isValidGroup(string); //return true if string is a valid group
void removeSeq(string); //removes a sequence, this is to accomadate trees that do not contain all the seqs in your groupfile
string getGroup(string);
+ void addSeq(string, string);
vector<string> namesOfGroups;
vector<string> namesOfSeqs;
map<string,int> seqsPerGroup; //groupname, number of seqs in that group.