#include<bits/stdc++.h>
#define ll long long
using namespace std;
const int N=1e6+10;
const int INF=0x3f3f3f3f;
inline int read(){int x=0,f=1;char ch=getchar();while (ch<'0'||ch>'9'){if (ch=='-') f=-1;ch=getchar();}while (ch>='0'&&ch<='9'){x=x*10+ch-48;ch=getchar();}return x*f;}
string s;
int main(){
	//freopen(".in","r",stdin);
	//freopen(".out","w",stdout);
	cin>>s;
	if(s.size()%2==0)for(int i=0;i<s.size();i+=2)cout<<s[i]<<s[i+1]<<" "; 
	else{
		cout<<s[0]<<" ";
		for(int i=1;i<s.size();i+=2)cout<<s[i]<<s[i+1]<<" ";
	}
}