ＨＤＵ３７８３　ＺＯＪ

#include <bits/stdc++.h>
using namespace std;
int main()
{
    string a;
    while(cin >> a)
    {
        int z = 0;
        int o = 0;
        int j = 0;
        if(a[0] == 'E')
        {
            break;
        }
        for (int i = 0; i < a.length(); i++)
        {
            if(a[i] == 'Z')
            {
                z++;
            }
            else if(a[i] == 'O')
            {
                o++;
            }
            else
            {
                j++;
            }
        }
        while(1)
        {
            if(z == 0 && o == 0 && j == 0)
            {
                break;
            }
            if(z != 0)
            {
                cout << 'Z' ;
                z--;
            }
            if(o != 0)
            {
                cout << 'O';
                o--;
            }
            if(j != 0)
            {
                cout << 'J';
                j--;
            }
        }
        cout << endl;
    }
    return 0;
}