#include <iostream>
#include <algorithm>
#include <cmath>
#include <map>
#include <cstdio>
#include <sstream>
#include <cstring>
#include <cctype>
using namespace std;
#define maxn 3000
int main()
{
int check[4]={0},mark=0;
char b[4]={‘G‘,‘P‘,‘L‘,‘T‘};
string s;cin >>s;
transform(s.begin(),s.end(),s.begin(),::toupper);
for (int i = 0; i < s.size(); i++)
for (int k = 0; k <= 3; k++)
if(s[i] == b[k])
check[k]++;
for (int i = 0; i <= 3; i++)if(check[i]) mark++;
while(mark)
{
for (int i = 0; i <= 3; i++)
if(check[i])
{
check[i]--;
cout<<b[i];
if(check[i] == 0)
mark--;
}
}
return 0;
}
