#include<bits/stdc++.h> using namespace std; int main(){ string y; cin>>y; int a=y.size(); for(int i=0;i<a;i++){ if(y[i]==y[i+2]&&i+2<a){ cout<<"Yes"; return 0; } if(y[i]==y[i+3]&&y[i+1]==y[i+2]&&i+3<a){ cout<<"Yes"; return 0; } } cout<<"No"; return 0; }