#include <stdio.h>
#include <string.h>

int main()
{
  int i, len;
  int start_pos, end_pos;
  char str1[] = "Computer Science and Engineering, University of Aizu";
  char *p, *q;
  
  len = strlen( str1 );
  printf("Input start and end positions (1 - %d): ", len);
  scanf("%d%d", &start_pos, &end_pos);

  /* for(i = ________; ________; i++) { */
  for(i = start_pos-1; i <= end_pos-1; i++) {
    printf("%c", str1[i]);
  }
  printf("\n");
  
  /* p = ________; */
  p = &str1[0];   /* str1 のみでもよい */
  /* for(i = ________; ________; i++) { */
  for(i = start_pos-1; i <= end_pos-1; i++) {
    /* printf("%c", ________(p ________)); */
    printf("%c", *(p+i));
  }
  printf("\n");

  /* for(________; ________; ________) { */
  for(q = p+start_pos-1; q <= p+end_pos-1; q++) {
    printf("%c", *q);
  }
  printf("\n");
  return 0;
}