Submission #1706740

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Source Code Expand

#include <cstdio>
#include <algorithm>
#include <iostream>
#include <vector>
#include <cmath>
#include <string>
#define pb push_back
#define mod 1000000007
using namespace std;
typedef long long int ll;

int main(void){
  string s;
  cin>>s;
  s.insert(4," ");
  cout<<s<<endl;
  return 0;
}

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