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