Submission #890665

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Source Code Expand

#include <bits/stdc++.h>
#define ln(S) (S).length()
using namespace std;

typedef long long llint;



int main(){
	string s;
	cin >> s;

	for (int i = 0; i < ln(s); ++i)
	{
		cout << s[i];

		if (i == 3)
			cout << " ";
	}
	cout << "\n";

	return 0;
}

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