#include<stdio.h> #include<string.h> int main(){ char name[100] ; double B ,V ; while (scanf("%s%lf%lf",&name ,&B ,&V ) && strcmp(name,"END")!=0 ){ printf("%s %.2lf ",name ,B-V ) ; double d=B-V ; if (d < -0.25)printf("O") ; else if (d < 0.0 )printf("B") ; else if (d < 0.25)printf("A") ; else if (d < 0.5 )printf("F") ; else if (d < 1.0 )printf("G") ; else if (d < 1.5 )printf("K") ; else printf("M") ; printf("\n") ; } }