#include <iostream> #include <stack> #include <string> using namespace std; stack <char> a; char res[1000100]; int main() { string s; cin >> s; int len = s.size(); for(int i = 0; i < len; i++) { if(s[i] == '@') while(!a.empty()) a.pop(); else if(s[i] == '#') a.pop(); else a.push(s[i]); } int cur = 1; while(!a.empty()) { res[cur++] = a.top(); a.pop(); } for(int i = cur - 1; i >= 1; i--) cout << res[i]; cout << endl; return 0; }