#include <stdio.h>

int main() {

      //실습2//
  /*  printf("Hello World!");
  printf("안녕하세요.");
    printf("1234567890");
    printf("abcdefg");*/

    //실습3//
  /*  printf("Hello, World! 안녕하세요. 1234567890. abcdefg");*/
 
       //실습4//
  /* printf("Hello World!\n");
  printf("안녕하세요.\n");
    printf("1234567890\n");
    printf("abcdefg\n");*/
    
    //실습5//
    printf("Hello,World!\n안녕하세요.\n1234567890\nabcdefg\n");
    
    return 0;
}