#include<bits/stdc++.h> using namespace std; char a[1010]; int main(){ int tmp=1; char b; while(cin>>b){ if(b=='#'){ tmp-=2; if(tmp <= 0) tmp = 0; } else if(b=='@') tmp=0; else a[tmp]=b; tmp++; } for(int i=1;i<=tmp-1;i++) cout<<a[i]; }