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

void chmin(int& a, int b){
    a = min(a, b);
}

int main(){
    vector<pair<char, char>> A[2];
    for(int t=0; t<2; t++){
        string s;
        cin >> s;
        s.push_back('!');
        s.push_back('!');
        for(int i=0; i<s.size()-1; i++){
            if(s[i+1] == '*'){
                A[t].emplace_back(s[i], '*');
                i++;
            }else if(s[i+1] == '?'){
                A[t].emplace_back(s[i], '?');
                i++;
            }else{
                A[t].emplace_back(s[i], ' ');
            }
        }
    }
    int N = A[0].size(), M = A[1].size();
    static int dp[2010][2010];
    for(int i=0; i<=N; i++) for(int j=0; j<=M; j++) dp[i][j] = 1e9;
    dp[0][0] = 0;
    for(int i=0; i<N; i++) for(int j=0; j<M; j++){
        chmin(dp[i+1][j], dp[i][j] + (A[0][i].second == ' '));
        chmin(dp[i][j+1], dp[i][j] + (A[1][j].second == ' '));
        chmin(dp[i+1][j+1], dp[i][j] + (A[0][i].first != A[1][j].first));
        if(A[0][i].first == A[1][j].first){
            if(A[1][j].second == '*') chmin(dp[i+1][j], dp[i][j]);
            if(A[0][i].second == '*') chmin(dp[i][j+1], dp[i][j]);
        }
    }
    cout << dp[N][M] << endl;
    return 0;
}