aoc12

arr = document.getElementsByTagName("pre")[0].innerText.split("\n").filter(function(n){return n;});

map = new Map();

arr.forEach(function(conn) {
	l = conn.split("-")[0]
	r = conn.split("-")[1]
	if (!map.get(l)) {
		map.set(l, []);
	}
	if (!map.get(r)) {
		map.set(r, []);
	}
	map.set(l, map.get(l).concat([r]))
	map.set(r, map.get(r).concat([l]))
})

count = 0;

dfs = function(current, path) {
	if (current == 'end') {
		count++;
		return;
	}
	if (path.indexOf(current)>=0 && current.substring(0,1).toLowerCase() == current.substring(0,1) && (path.filter(function(a){return path.filter(function(b){return a == b}).length>1 && a.substring(0,1).toLowerCase() == a.substring(0,1)}).length>0 || current=='start' || current=='end')) {
		return;
	}
	map.get(current).forEach(function(next) {
		dfs(next, path.concat([current]));
	});
}

dfs("start", []);