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

class TextProcessor {
public:
   static int count;
   
   static void convert(string s) {
       for (int i=0;i<s.length();i++){
           if(!((is[i]>='a' && s[i]<='z') || (s[i]>='A'&& s[i]<='Z')))
               cout<<"Invalid input"<<endl;
               return;
            }
       }
       for (int i=0;i<s.length();i++){
           s[i]=toupper(s[i]);
       }
       cout<<s<<endl;
       count++;
   }
}
int TextProcessor::count=0;

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