#include <bits/stdc++.h>
using namespace std;
bool f = false;
string n;
int h, cnt, ans;
char a[20];

int main() {
	cin >> n;
	for (char c : n) {
		if (h==0&&c * 1 == 60) {
			h++;
			a[h] = c;
			cnt++;
		}
		if (h != 0 && c == 61) {
			h++;
			a[h] = c;
			ans++;
			cnt++;
		}
		if (h != 0 && c == 62) {
			h++;
			a[h] = c;
			cnt++;
			if (cnt - ans == 2&&ans!=0) {
				f = true;
			}
		}
	}
	if (f == false)
		cout << "No";
	else
		cout << "Yes";
	return 0;
}