#include <iostream> #include <string> using namespace std; int main() { string s; cin >> s; int n = s.length(); for (int i = 0; i < n - 1; i++) { if (s[i] == s[i + 1]) { cout << "Yes" << endl; return 0; } if (i < n - 2 && s[i] == s[i + 2]) { cout << "Yes" << endl; return 0; } } cout << "No" << endl; return 0; }