rt：

#include <bits/stdc++.h>
#define int long long
using namespace std;
int ans=1;
string s,st="";
signed main() {
	int p;
	cin>>s;
	for (int i=0;i<s.size ();i++) {
		if (s[i]!='[') st+=s[i];
		else {
			p=i;
			break;
		}
	}
	cout<<st;
	for (int i=p+1;i<s.size ();i++)
		if (s[i]>='0' && s[i]<='9') ans=ans*(s[i]-'0');
	st="";
	for (int i=p+1;i<s.size ();i++) 
		if ((s[i]>='a' && s[i]<='z') || (s[i]>='A' && s[i]<='Z')) st+=s[i];
	for (int i=1;i<=ans;i++) 
	    cout<<st;
	return 0;
}