var58_2008_s2_5

#include <iostream>
#include <cstring>
using namespace std;
char x[55],rez[55];
int main ()
{
    int l=0,i,n;
    cin.getline(x,55);
    n=strlen(x);
    for (i=0;i<=n-1;i++)
    {
        if (isdigit(x[i])==0 && x[i]!=' ')
        {
            rez[l]=x[i];
            l++;
        }
    }
    cout<<rez;
    return 0;
}