Submission #1954985

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Source Code Expand

#include <iostream>
#include <string>
#include <algorithm>
#include <cmath>
#include <map>
#define MOD 1000000007LL
using namespace std;

int main(){
	string s;
	cin >> s;
	if(s[0] == s[1] && s[1] != s[2] && s[2] == s[3]) cout << "Yes" << endl;
	else cout << "No" << endl;
	return 0;
}

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