#include <stdio.h>
int main()
{
int c,d;
d = 0;
while ((c = getchar()) != EOF)
{
if (c == ' ')
++d;
if (d <= 1 && c == ' ')
putchar(' ');
if (c != ' ')
{
d = 0;
putchar(c);
}
}
}
#include <stdio.h>
int main()
{
int c,d;
d = 0;
while ((c = getchar()) != EOF)
{
if (c == ' ')
++d;
if (d <= 1 && c == ' ')
putchar(' ');
if (c != ' ')
{
d = 0;
putchar(c);
}
}
}