Ordna siffror till 7105 (gåta?)

function getSubset(set, order) {
	let subset = [];
	let antiSubset = [];
	let index = 0;
	while (order > 0) {
		if ((order & 1) === 1) {
			subset.push(set[index]);
		} else {
			antiSubset.push(set[index]);
		}
		index++;
		order = Math.floor(order/2);
	}
	
	for (; index < set.length; index++) {
		antiSubset.push(set[index]);
	}
	return {subset: subset, antiSubset: antiSubset};
}

function sumArray(array) {
	return array.reduce((a, b) => a + b, 0);
}

function logSolution(result) {
	console.log("Error: " + result.bestError);
	for (let i = 1; i <= 6; i++) {
		console.log(result.solution[i]);
	}
}

function selectGroup(numbersLeft, grpNumber, targetSum, currentError, result) {
	if (grpNumber === 6) {
		let newError = currentError + Math.abs(sumArray(numbersLeft) - targetSum);
		if (newError < result.bestError) {
			result.bestError = newError;
			result.solution[grpNumber] = numbersLeft;
			logSolution(result);
		}
	} else {
		for (let i = 1; i < (1 << numbersLeft.length); i+=2) {
			let subsets = getSubset(numbersLeft, i);
			let newError = currentError + Math.abs(sumArray(subsets.subset) - targetSum);
			if (newError < result.bestError) {
				result.solution[grpNumber] = subsets.subset;
				selectGroup(subsets.antiSubset, grpNumber + 1, targetSum, newError, result);
			}
		}
	}
}

let numbers = [1718, 1710, 1891, 1766, 1741, 1711, 1763, 1762, 1795, 1928, 1802,
1747, 1758, 1781, 1911, 1773, 1761, 1747, 1729, 1765, 1725, 1734, 1717, 1895];
selectGroup(numbers, 1, sumArray(numbers)/6, 0, {bestError: 8, solution: new Array()});