#include <stdio.h>

/*Write a program to copy its input to its output, replacing each string of one or more blanks by a single blank*/

main()
{

    int c;
    while ((c=getchar())!=EOF)
    {
        putchar(c);
        while (c==' ')
        {
            c=getchar();
            if (c!=' ')
                putchar(c);
        }

    }


}

//FINNNNNNAAAAALLLLLLYYYYYYYYYYYY :')