fail("right context not found");
} else {
NavigableSet<Integer> leftIndices = intervalIndices(leftInterval);
int[] suffixTable = lst.getSuffixTable();
expectedSet = new HashMultiset<IntSequence>();
for (int i = rightInterval.left(); i <= rightInterval.right(); i++) {
int end = suffixTable[i];
Integer start = leftIndices.floor(end);
if (start != null && end - start < WINDOW_SIZE) {
IntSequence fillerSeq = lst.getSequence().subSequence(start, end);
boolean hasSpecial = false;