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#include <bits/stdc++.h>
#define int long long //(有超时风险)
#define PII pair<int,int>
#define endl '\n'
#define LL __int128using namespace std;const int N=2e6+10,M=1e3+10,mod=998244353,INF=0x3f3f3f3f;int a[N],b[N],c[N],pre[N];signed main()
{std::ios::sync_with_stdio(false);std::cin.tie(nullptr);string s;cin>>s;for(int i=0;i<s.size();i++){if(s[i]>'0'&&s[i]<='9'){int cnt=s[i]-'0';for(int j=1;j<=cnt-1;j++)cout<<s[i-1];}else cout<<s[i];}return 0;
}