var speed_limit 20000 var text var texts var elements document getElem

var speed_limit = 20000;
var text = "";
var texts = [];
var elements = document.getElementsByClassName('text');
for (var el in elements) {
    texts.push(elements[el].innerText)
}

var input = document.getElementById('inputtext');

var count = 0;
var element;
var flag = false;

input.addEventListener('keyup', function(e) {
	var inp_text = e.target.value;
	count = 0;
	var reg_exp = new RegExp("^(" + inp_text + ")", "i");
	for (var el in texts) {
		if (reg_exp.test(texts[el])) {
			count++;
			element = texts[el];
			console.log(texts[el]);
		}
	}
	console.log(count);
	if (count == 1 && !flag) {
		flag = true;
		input.value = "";

		text = element;
		var words = text.split(' ');

		var speed = ((text.length / words.length) / (speed_limit / 60)) * 1000;

		var counter = 0;

		var timer = setInterval(function() {
			if (counter >= words.length) {
				return;
			}
			input.value += words[counter++] + " ";
		    input.onkeyup();
		}, speed);
	}
})