/* *
 * Exercise 1-12. Write a program that prints its input one word per line.
 * */

#include <stdio.h>
#define IS_UPPER(N) ((N) >= 'A' && (N) <= 'Z')   /* 'A'==65 && 'Z'==90 */
#define IS_LOWER(N) ((N) >= 'a' && (N) <= 'z')   /* 'a'==97 && 'z'==122 */
#define IS_ALPHA(N) (IS_LOWER(N) || IS_UPPER(N)) /* [A-Za-z] x*/
#define OUT 0
#define IN  1
int main(void)
{
  int c = EOF, state = OUT;
  while ((c = getchar()) != EOF) {
    if (IS_ALPHA(c)) {
      state = IN;
      putchar(c);
    }
    else if (state == IN) {
      state = OUT;
      putchar('\n');
    }
  }

  return 0;
}