var tier = 0;

say(npc, "Yo I'm a dinosaur, so rawr and stuff.");

function onchat(player, msg) {
	msg = msg.toLowerCase();
	msg = msg.replace(",", " , ");
	msg = msg.replace(".", " . ");
	msg = msg.replace("!", " . ");
	msg = msg.replace("?", " . ");
	var msgArray = msg.split(" ");

	if(msg.contains("sell") || msg.contains("buy") || msg.contains("trade")){

	var canArray = ["can", "may", "could", "do"];
	var youArray = ["you", "u", "ya"];
	var tradeArray = ["sell", "buy", "trade"];
	var endSentenceArray = ["?", "!", "."];
	var andArray = ["and", "also", "btw"];
	var numberArray = ["1", "2", "3", "4", "5", "6", "7", "8", "9"];
	var wordI = "i";
	var wordComma = ",";

	var sentence = checkSentence(tradeArray, canArray, youArray, endSentenceArray, andArray, wordI, wordComma, numberArray);

	say(npc, "I can read: ");
	say(npc, "I can see you said this: ");
	say(npc, "");

}
}

function checkSentence(msgArray, canArray, youArray, tradeArray, endSentenceArray, andArray, wordI, wordComma, numberArray){
	var ArrayOutput = [];
	var words_output = [];
	var mainLayout_output = ["normal"];
	var layout1_output = [];
	var layout2_output = [];

	for (var i = 0; i < msgArray.length; i++){

		if(canArray.indexOf(msgArray[i]) > -1){

			words_output.push("canArray");

		}else if(youArray.indexOf(msgArray[i]) > -1){

			words_output.push("youArray");

		}else if(tradeArray.indexOf(msgArray[i]) > -1){

			words_output.push("tradeArray");
			mainLayout_output.push("objective");

		}else if(endSentenceArray.indexOf(msgArray[i]) > -1){

			words_output.push("endSentenceArray");
			if(msgArray[i] == "!"){
				if(msgArray[i + 1] == undefined || numberArray.indexOf(msgArray[i + 1]) > -1 || endSentenceArray.indexOf(msgArray[i + 1]) > -1){
					mainLayout_output[0] = "yelling";
				}
			}else if(msgArray[i] == "?"){
				if(mainLayout_output[mainLayout_output.length - 1] == "objective"){
					mainLayout_output[mainLayout_output.length - 1] = "question";
				}else if(mainLayout_output[mainLayout_output.length - 2] == "objective"){
					mainLayout_output[mainLayout_output.length - 2] = "question";
				}
			}
		}else if(msgArray[i] == wordI){

			words_output.push("wordI");

		}else if(msgArray[i] == wordComma){

			words_output.push("wordComma");

			layout1_output = mainLayout_output;
			mainLayout_output = ["normal"];

			if(andArray.indexOf(msgArray[i + 1]) > -1){
				words_output.push("andArray");
				layout1_output = mainLayout_output;
				mainLayout_output = ["normal"];
			}

		}
	}
	layout2_output = mainLayout_output;
	ArrayOutput = [words_output, layout1_output, layout2_output];
	return ArrayOutput;
}