1 #include <iostream>
 2 #include <algorithm>
 3 #include <cstring>
 4 #include <cstdio>
 5 #include <cmath>
 6 #include <stack>
 7 #include <set>
 8 #include <map>
 9 #include <queue>
10 #include <climits>
11 #include <bitset>
12 #define PI 3.1415926
13 
14 using namespace std;
15 const int MY_MAX = 35;
16 int N, M;
17 
18 int main()
19 {
20     cin >>N;
21     while (N --)
22     {
23         string my_str;
24         cin >>my_str;
25         int str_len = my_str.size();
26         for (int i = 0; i < str_len; ++ i)
27         {
28             if (my_str[i] >= ‘A‘ && my_str[i] <= ‘Z‘)
29                 my_str[i] = char(‘a‘ + my_str[i] - ‘A‘);
30             else
31                 my_str[i] = char(‘A‘ + my_str[i] - ‘a‘);
32         }
33         cout <<my_str <<endl;
34     }
35 
36     return 0;
37 }