#include"stdio.h"
bool fun_1(char ch[])
{
char *p1=ch,*p2=ch;
while(*p2){p2++;}
p2--;
while(p1
{
if(*p1!=*p2)return 0;
p1++;
p2--;
}
return 1;
}
int fun_2(int data[],int m,int n)
{
int temp=0;
if(0
{
for(;m<=n;m++)
temp+=data[m-1];
}
else
printf("Error!");
return temp;
}
void main()
{
char ch[30];
gets(ch);
if(fun_1(ch))printf("回文\n");
else printf("不是回文\n");
int data[10],m,n;
for(int i=0;i<10;i++)
scanf("%d",&data[i]);
scanf("%d%d",&m,&n);
printf("%d",fun_2(data,m,n));
}