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a month ago

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#include <iostream>
#include <string>
using namespace std;

int main() {
	setlocale(LC_ALL, "Russian");
	string a; 
	cin >> a;

	for (int i = 0; i < a.length(); i++) {
		if (a[i] == '2' || a[i] == '3') {
			a[i] = '5';
		}
	}
	cout << a;

}