public void IndicesExcluded()
{
var s1 = "abc";
var s2 = "bc";
// this returns exactly one left-aligned common subsequence, chosen randomly
var ss = LongestCommonSubsequence.LeftAlignedLCS(s1, s2);
// get the excluded indices
var idxs = LongestCommonSubsequence.GetMissingCharIndices(s1, ss);
Assert.AreEqual(1, idxs.Count());
Assert.AreEqual(idxs[0], 0);
}