public boolean isStrongLlk(MyLang language) {
		// FIRSTk(a FOLLOWk(A)) + FIRSTk(b FOLLOWk(A)) = 0
		boolean retValue = true;
		int indexI = 0;
		List<Node> rules = language.getLanguarge();
		for (Node ruleI : rules) {
			if (!retValue) {
				break;
			}
			++indexI;
			LlkContext contextI = ruleI.getFirstFollowK();
			int indexJ = 0;
			for (Node ruleJ : rules) {
				++indexJ;
				if (ruleI == ruleJ || !retValue) {
					break;
				}
				if (ruleI.getRoole()[0] == ruleJ.getRoole()[0]) {
					LlkContext contextJ = ruleJ.getFirstFollowK();
					for (int i = 0; i < contextI.calcWords(); ++i) {
						if (contextJ.wordInContext(contextI.getWord(i))) {
							System.out.println(
									String.format("Rules with indices %s and %s do not conform to strong LLk k = %s",
											indexI, indexJ, language.getLlkConst()
									)
							);
							retValue = false;
							break;
						}
					}
				}
			}
		}
		return retValue;
	}