#include<iostream>
#include<string>
#include<cctype>
using namespace std;

class TextProcessor{
    private:
    static int validCount;
    
    public:
    static coid processString(const string & str){
        
        for(char ch : str)
        {
            if(!isalpha(ch)){
                cout<<"Invalid input"<<endl;
                return;
                
            }
        }
        
        string upperStr = str;
        for(char & ch : upperStr){
            ch = toupper(ch);
        }
        
        cout<<upperStr<<endl;
        validCount++;
    }
    
    static int getValidCount(){
        return validCount;
    }
};

int TextProcessor::validCount = 0;

int main(){
    int n;
    cin>>n;
    cin.ignore();
    
    for(int i=0;i<n;i++){
        string str;
        getline(cin,str);
        TextProcessor::processString(str);
        
    }
    return 0;
}