#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
using namespace std;
// using namespace __gnu_pbds;
// typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define pii pair<int, int>
#define mpr make_pair
#define fi first
#define se second
#define int long long
#define Local
const int sz = 1e6+5;
const int inf = 1e9 + 7;
const int mod = 998244353;
int bin_pow(int x, int b) {
int res = 1;
while (b > 0) {
if (b & 1) {
res = (res * x) % mod;
}
x = (x * x) % mod;
b >>= 1;
}
return res;
}
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
#ifdef Local
// freopen("main.in", "r", stdin);
// freopen("main.out", "w", stdout);
#endif
string s;
cin >> s;
cout << s.substr(0, s.size()/2) << " " << s.substr(s.size()/2, s.size()/2);
}
