#include <stdio.h>
#include <stdlib.h>

void dwa_razy_do (void);

int main (int argc, char *argv[])
{
    dwa_razy_do ();
    return 0;
}

void dwa_razy_do (void)
{
    int a, b;
    a=getchar();
    do
    {
        putchar (a);
        putchar (a);

    }
    while((c = getchar())!=EOF);
}
