// Rules X2, X3, X4, X5, X5a, X5b, X5c
		switch t {
		case RLE, LRE, RLO, LRO, RLI, LRI, FSI:
			isIsolate := t.in(RLI, LRI, FSI)
			isRTL := t.in(RLE, RLO, RLI)

			// override if this is an FSI that resolves to RLI
			if t == FSI {
				isRTL = (p.determineParagraphEmbeddingLevel(i+1, p.matchingPDI[i]) == 1)
			}
			if isIsolate {
				p.resultLevels[i] = stack.lastEmbeddingLevel()