else if ("guano".equals(loaderArg))
return new GuanoAlgorithm(seq1, seq2);
else if ("fitopsy".equals(loaderArg))
return new DiffXFitopsy(seq1, seq2);
else if ("kumar".equals(loaderArg))
return new DiffXKumarRangan(seq1, seq2);
else if ("wesyma".equals(loaderArg))
return new DiffXFitWesyma(seq1, seq2);
else {
usage();
}