# include<iostream> using namespace std; string s; bool fun(int l,int r){ int lenn=r-l+1; for(int i=0;i<lenn/2;i++) if(s[l+i]!=s[r-i]) return false; return true; } int main(){ cin>>s; int lenn=s.size(); for(int i=0;i<lenn-1;i++){ for(int j=lenn-1;j>=i;j--){ if(fun(i,j)&&(j-i>0)) {cout<<"Yes"<<endl; return 0;} } } cout<<"No"<<endl; return 0; } //caddd //0123456 //cabaddd-no //cabadd- //cabad //caba //cab //ca //abaddd //abadd //abad //aba