#include<stdio.h>
#include<string.h>
int main()
{int m;
 int M;
 scanf("%d",&m);//输入质量
 
 if (m<=1000){
 	M = 1;
 }else{M = 2;
 }//判断是否超重
 
 int f;
 switch(M)
 {case 1:f = 8;
  case 2:if(m%500==0){
  	f = 8 + ((m-1000)/500)*4;
	break;
  } else if(m%500!=0){
  	f = 8 + ((m-1000)/500+1)*4;
  }
 } //计算基础邮费
 
 char x[256];
 scanf("%s",&x);

 if(strcmp(x,"y")==0){
 f += 5;
 }
 else{f=f;
 }//判断是否加急
 	
 printf("%d",f);//输出
 
 return 0;
 }