List<string> a = new List<string>();
            List<string> b = new List<string>();
 
            using ( StreamReader reader = new StreamReader(File.OpenRead(FILE_PATH)) ) {
                string line = null;
                string[ ] parts = null;
 
                try {
                    while ( (line = reader.ReadLine()) != null ) {
                        if ( String.IsNullOrEmpty(line) ) continue;
 
                        parts = line.Split(new char[ ] { '\t' }, StringSplitOptions.RemoveEmptyEntries);
 
                        if ( parts.Length >= 1 ) {
                            a.Add(parts[0]);
 
                            if ( parts.Length >= 2 ) {
                                b.Add(parts[1]);
                            }
                        }
                    }
                } catch ( Exception exception ) {
                    throw exception;
                } finally {
                    reader.Close();
                }
            }