#include <iostream>
#include <cstring>
using namespace std;
///ifstream cin("k1.in");
///ofstream cout("k1.out");
long long v[1000001],i,n,m,sum1,j,k,sum2,p;
char s[1000000];
int main()
{
    cin>>s;
    n=strlen(s);
    for(i=0; i<n; i++)
    {
        if(s[i]=='x'){
        j=i-1;
        while(s[j]!='-'||s[j]!='+'||j!=-1){
            j--;
            if(j==-1)
                break;
        }
        cout<<i<<endl;
        }
    }
    return 0;
}