#33249: c 極短解
anjh10607@anjh.tn.edu.tw
(7許庭睿)
int main() {
char arr[10][4]={"BNZ","AMW","KLY","JVX","HU","GT","FS","ER","DOQ","CIP"};
int s=0;for(int i=8;i>0;i--)s=(s+((getchar()-'0')*i))%10;
printf("%s\n",arr[(10-(s+getchar()-'0')%10)%10]);
}