(() => {
	const process = (_num, flag = false, history = []) => {
		let num = String(_num);
		let arr = num.split('');
		history.push(arr);
		let sum = arr
			.map(itm => parseInt(itm))
			.reduce((sum, current) => sum + current);
		if(!sum) return false;
		if(String(sum).length > 1){
			return process(sum, flag, history)
		}
		return !flag ? sum: {sum, history};
	};
	let res = process(999999999999991, true);
console.log(res);

})();