#include <bits/stdc++.h>
using namespace std;

void check(string word)
{
    int len = word.length(), smallorbig = 1; // big
    if(len%2==1)
    {
        for(int i=0;i<len;i++)
        {
            if(i%2==0)
            putchar(toupper(word[i]));
            else putchar(tolower(word[i]));
        }
    }
    else
    {
            for(int i=0;i<len/2;i++)
            {
            if(i%2==0)
            putchar(toupper(word[i]));
            else putchar(tolower(word[i]));
            }
            for(int i=len/2;i<len;i++)
            {
            if(i%2==1)
            putchar(toupper(word[i]));
            else putchar(tolower(word[i]));
            }
    }
}

void single(string str)
{
    string word = "";
    for (auto x : str)
    {
        if (x == ' ')
        {
            check(word);
            cout << " ";
            word = "";
        }
        else
            word = word + x;
    }
    check(word);
}

int main()
{
	int t; cin >> t; getchar();
	while(t--)
	{
	    string str;
	    getline(cin, str);
        single(str);
        cout << '\n';
	}
}