include<bits/stdc++.h>

using namespace std;
int tmp=0;
bool dequy(string s,int i)
{
if(s[i]==s[i+1]){
return dequy(s,i+2);
tmp++;
}
if(tmp%2==1)
return false;
else
return true;
}

int main()
{
string s;
cin>>s;
if(dequy(s,0))
cout<<"Yes";
else
cout<<"No";
}