#include <bits/stdc++.h>
using namespace std;
int N=1000005,crivo[1000005];
int main()
{
    string s1,s2;
    int a=0,c=0;
    double ans;
    cin >> s1;
    cin >> s2;
    for (int i=0;i<s1.size();i++)
    {
        if (s1[i]=='+')
            a++;
        else if (s1[i]=='-')
            a--;
        else if (s1[i]=='?')
            c++;
    }
    for (int i=0;i<s2.size();i++)
    {
        if (s2[i]=='+')
            a--;
        else if (s2[i]=='-')
            a++;
        else if (s2[i]=='?')
            c++;
    }
    if (c==0)
    {
        if (a==0)
        {
            ans=1;
        }
        else
        {
            ans=0;
        }
        printf("%lf",ans);
    }
}