}
	}
	level := p.resultLevels[indexes[0]]
	return &isolatingRunSequence{
		p:       p,
		indexes: indexes,
		types:   types,
		level:   level,
		sos:     typeForLevel(maxLevel(prevLevel, level)),
		eos:     typeForLevel(maxLevel(succLevel, level)),
	}
}

// Resolving weak types Rules W1-W7.
//
// Note that some weak types (EN, AN) remain after this processing is
// complete.