#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 */

int main (void)
{
  char c, last;
  last = '\0';
  do {
    c = getchar();
    if(!(c == 32 && last == 32)) {
      putchar(c);
    }
    last = c;
  }while (c != EOF);
}