#include <stdio.h>
 
int main() {
    int data[20];
    int count_S=0,count_A=0,count_B=0,count_C=0,count_D=0;
 
    for(int i=0;i<20;i++) {
        scanf("%d",&data[i]);
        if(data[i]<0||data[i]>100) {
           i--;
        }
 
        if(data[i]>=90) {
            count_S++;
        } else if(data[i]>=80) {
            count_A++;
        } else if(data[i]>=70) {
            count_B++;
        } else if(data[i]>=60) {
            count_C++;
        } else {
            count_D++;
        }
    }
 
    printf("S: %d人\n", count_S);
    printf("A: %d人\n", count_A);
    printf("B: %d人\n", count_B);
    printf("C: %d人\n", count_C);
    printf("D: %d人\n", count_D);
 
    return 0;
}
 

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