#include<iostream>
using namespace std;
class Textprocessor
{
    public:
    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;
        }
    }
}