#include
using namespace std;
string remove_duplicates(string s1,int i)
{
if(s1[i]==’\0’||s1[i+1]==’\0’)
{
return s1;
}
if(s1[i]==s1[i+1])
{
int k=i;
while(s1[k]!='\0')
{
k++;
}
s1[k+1]='\0';
for(int j=k;j>i+1;j--)
{
s1[j]=s1[j-1];
}
s1[i+1]='*';
return(remove_duplicates(s1,i+2));
}
return(remove_duplicates(s1,i+1));
}
int main()
{
string s;
int i=0;
cin>>s;
s=remove_duplicates(s,0);
while(s[i]!=’\0’)
{
cout<<s[i];
i++;
}
}