#include <iostream>
#include <string>
using namespace std;
int main()
{
//ifstream cin("input.txt");
//ofstream cout("output.txt");
int n,i,j,m,sr;
string words;
getline(cin,words);
m=0;
n=words.length();
for (i=0;i<n;i++)
{
sr=(int)(words[i]);
if (sr>=97&&sr<=122)
m++;
for (j=0;j<m;j++)
words.erase(j,1);
}
cout<<words;
return 0;
}
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