#include<stdio.h>
int main()
{
   int i, data[20], s=0, a=0, b=0, c=0, d=0;
 
   for(i = 0; i < 20; i++) {
       scanf("%d", &data[i]);  // 配列に20個の数字を入力させる
   }
 
   for(i = 0; i < 20; i++) {
       if(data[i] >= 90)
           s++;
       else if(data[i] >= 80)
           a++;
       else if(data[i] >= 70)
           b++;
       else if(data[i] >= 60)
           c++;
       else
           d++;
   }
 
   printf("S: %d , A: %d , B: %d , C: %d , D: %d\n", s, a, b, c, d);
 
   return 0;
}

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99
54
32
16
88
87
98
67
90
48
43
23
45
65
77
88
65
12
11
90