#include<iostream>
using namespace std;
class textProcessor{
    public:
    static int count;
    static void process(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++){
                if(str[i]>='a'&& str[i]<='z'){
                    str[i]=str[i]-32;
                }
            }
            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::process(str);
    }
    return 0;
}