#include <iostream>
#include <cstring>
#include <string.h>
using namespace std;

char s[256];

void elim(int i, int k)
{
    while (s[i] != '\0')
    {
        s[i - k] = s[i];
        i++;
    }
    s[i - k] = '\0';
}
int main()
{
    cin >> s;
    int i = 0, k = 0;
    for (i = 0; i < strlen(s); i++)
    {
        if (tolower(s[i]) == tolower(s[i - 1]))
            k+=1;
        else
        {
            if (k != 0)
            {
                elim(i, k+1);
                i = 0;
            }
            k = 0;
        }
        if (s[i] == '\0')
        {
            s[i] = ' ';
            s[i + 1] = '\0';
        }
    }

    cout << s;
    return 0;
}