#include <iostream>
#include <cstdlib>
#include <string>
using namespace std;
const int MaxSize = 50;
struct SqStack
{
    char data[MaxSize];
    int top;
};
void InitStack(SqStack *&s);
bool Push(SqStack *s,char e);
char Pop(SqStack *s);
void InitStack(SqStack *&s)
{
    s=(SqStack *)malloc(sizeof(SqStack));
    s->top=-1;
}
bool Push(SqStack *s,char e)
{
    if(s->top==MaxSize-1)
        return false;
    else
    {
        s->top++;
        s->data[s->top]=e;
    }
    return true;
}
char Pop(SqStack *s)
{
    return (s->data[s->top--]);
}
int main()
{
    SqStack *s;
    bool flag = true;
    char str[MaxSize];
    InitStack(s);
    cin>>str;
    for(int i = 0; str[i] != '\0'; i++)
        Push(s,str[i]);
    for(int j = 0; str[j] != '\0'; j++)
    {
        if(str[j]!=Pop(s))
        {
            flag = false;
            break;
        }
    }
    if(flag)
        cout<<"Yes"<<endl;
    else
        cout<<"No"<<endl;
    return 0;
}