#include<iostream>
#include<string>
#include<cctype>
using namespace std;
class textprocessor{
    private:
    static int count;
    public:
    static void converttoupper(string str) {
        bool valid=true;
        for(int i=0;i<str.length();i++) {
            if(!((str[i]>='a'&&str[i]<='z')||(str[i]>='A'&&str[i]<='z'))){
                valid=false;
                break;
            }
        }
        if(valid){
            for(int i=0;i<str.length();i++){
                str[i]=toupper(str[i]);
            }
            cout<<str<<endl;
            count++;
        }else{
            cout<<"Invalid input"<<endl;
        }
    }
};
int textprocessor::count=0;
int main(){
    int n;
    cin>>n;
    string str;
    for(int i=0;i<n;i++){
        cin>>str;
        textprocessor::convertoupper(str);
    }
    return 0;
}