#include <iostream>
using namespace std;
void Stampa (char a)
{
if ((a>='A')&&(a<='Z')) {cout<<a<<"\t";}
}
char X;
int main() {
cin>>X;
Stampa(X);
cin>>X;
Stampa(X);
cin>>X;
Stampa(X);
return 0;
}
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