function Main(input) {
	var times = new Array(26)
	for (var i = 0; i < 26; ++i) {
		times[i] = 0;
	}
	for (var i = 0; i < input.length; ++i) {
		var index = input.charCodeAt(i) - "a".charCodeAt(0)
		++times[index]
	}
	
	for (var i = 0; i < 26; ++i) {
		if (times[i] % 2 == 1) {
			console.log("No")
			return;
		}
	}
	console.log("Yes")
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));
