#include <bits/stdc++.h>
using namespace std;

int main(){
    string s;
    cin >> s;
    vector<int> ok,ng;
    for(int i = 0;i < 10;i++){
        if(s[i]=='o') ok.push_back(i);
        else if(s[i]=='x') ng.push_back(i);
    }

    int ans = 0;
    for(int i = 0;i<10;i++){
        for(int j = 0;j<10;j++){
            for(int k = 0;k<10;k++){
                for(int l = 0;l<10;l++){
                    bool isok = true;
                    for(int m : ok) if(i!=m&&j!=m&&l!=m&&k!=m) isok = false;
                    for(int m : ng) if(i==m||j==m||l==m||k==m) isok = false;
                    if(isok) ans++;
                }
            }
        }
    }

    cout << ans << endl;
}
#include <bits/stdc++.h>

#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define FOR(i,n,m) for(int i=(int)(n); i<=(int)(m); i++)
#define RFOR(i,n,m) for(int i=(int)(n); i>=(int)(m); i--)
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define RITR(x,c) for(__typeof(c.rbegin()) x=c.rbegin();x!=c.rend();x++)
#define setp(n) fixed << setprecision(n)

template<class T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; }

#define ll long long
#define vll vector<ll>
#define vi vector<int>
#define pll pair<ll,ll>
#define pi pair<int,int>

#define all(a) (a.begin()),(a.end())
#define rall(a) (a.rbegin()),(a.rend())
#define fi first
#define se second
#define pb push_back
#define ins insert

#define debug(a) cerr<<(a)<<endl
#define dbrep(a,n) rep(_i,n) cerr<<(a[_i])<<" "; cerr<<endl
#define dbrep2(a,n,m) rep(_i,n){rep(_j,m) cerr<<(a[_i][_j])<<" "; cerr<<endl;}

using namespace std;

template<class A, class B>
ostream &operator<<(ostream &os, const pair<A,B> &p){return os<<"("<<p.fi<<","<<p.se<<")";}
template<class A, class B>
istream &operator>>(istream &is, pair<A,B> &p){return is>>p.fi>>p.se;}

template<class T>
vector<T> make_vec(size_t a){
	return vector<T>(a);
}
template<class T, class... Ts>
auto make_vec(size_t a, Ts... ts){
	return vector<decltype(make_vec<T>(ts...))>(a, make_vec<T>(ts...));
}

/* Some Libraries */

//-------------------------------------------------

int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    int N; cin>>N;

    map<int,int> mp;
    rep(i,N){
        ll a; cin>>a;
        mp[a]++;
    }

    ll ans=(ll)N*(N-1)/2;
    for(auto e:mp){
        ans-=(ll)e.se*(e.se-1)/2;
    }
    cout<<ans<<"\n";

    return 0;
}
