#include <iostream>
using namespace std;

int pot4(int x) {
	return x * x * x * x;
}

int main() {
	string s;
	cin >> s;
	int a = 0, b = 0;
	for (auto c : s) {
		a += c == '?';
		b += c == 'o';
	}
	int ans = 0;
	if (b == 0) ans = pot4(a); 
	if (b == 1) ans = pot4(a+1) - pot4(a);
	if (b == 2) ans = pot4(a+2) - 2 * pot4(a+1) + pot4(a);
	if (b == 3) ans = pot4(a+3) - 3 * pot4(a+2) + 3 * pot4(a+1) - pot4(a);
	if (b == 4) ans = 24;
	cout << ans << endl;
	return 0;
}