#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main() {
string a, b, c;
cin >> a >> b >> c;
if (a > b) swap(a, b);
if (a > c) swap(a, c);
if (b > c) swap(b, c);
cout << a << '\n' << b << '\n' << c;
}
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