/* Program to compute grades for CPSC 441 students */
/* Usage:                                          */
/*   cc -o grading grading.c                       */
/*   ./grading < marks.txt                         */
/*                                                 */
/* Written by Carey Williamson   January 12, 1968  */

#include <stdio.h>

#define STRLEN 15

main()
  {
    char fname[STRLEN], lname[STRLEN];
    int id;
    float a1, a2, a3, a4, a5;
    float mid;
    float fin;
    float tot;
    char grade;
    char flag;

    while( scanf("%s %s %d %f %f %f %f %f %f %f\n",
		 fname, lname, &id, &a1, &a2, &a3, &a4, &a5, &mid, &fin) == 10 )
      {
	tot = a1 + a2 + a3 + a4 +a5;
	tot /= 5;
	tot += 0.25 * (100.0*mid/50.0);
	tot += 0.5 * fin;
	grade = 'F';
	flag = ' ';
	if( tot >= 50 )
	  {
	    grade = 'D';
	    flag = ' ';
	  }
	if( tot >= 55 )
	  {
	    grade = 'C';
	    flag = '-';
	  }
	if( tot >= 60 )
	  {
	    grade = 'C';
	    flag = ' ';
	  }
	if( tot >= 65 )
	  {
	    grade = 'C';
	    flag = '+';
	  }
	if( tot >= 70 )
	  {
	    grade = 'B';
	    flag = '-';
	  }
	if( tot >= 75 )
	  {
	    grade = 'B';
	    flag = ' ';
	  }
	if( tot >= 80 )
	  {
	    grade = 'B';
	    flag = '+';
	  }
	if( tot >= 85 )
	  {
	    grade = 'A';
	    flag = '-';
	  }
	if( tot >= 90 )
	  {
	    grade = 'A';
	    flag = ' ';
	  }
	if( tot >= 95 )
	  {
	    grade = 'A';
	    flag = '+';
	  }
	printf("%12s %-12s %4.1f %4.1f %4.1f %4.1f %4.1f %5.1f %5.1f %5.1f %c%c\n",
	       fname, lname, a1, a2, a3, a4, a5, mid, fin, tot, grade, flag);
      }
  }