#include <stdio.h>
#include <ctype.h>

void main()
{
    char ch;

    do
    {
        ch = fgetchar();
        if(isspace(ch))
        {
            while(isspace(ch))
            {
                ch = fgetchar();
            }
            fputchar('\n');
        }
        fputchar(ch);
    }
    while(ch!=EOF);
}