SIR CAN YOU PLEASE TELL ME WHAT IS THE PROBLEM WITH THIS SOLUTION

#1

#include
using namespace std;
int main() {

char ch;
cin >>ch ;

if(ch>='a'&& ch<='z')
{
	cout << "L";
}
else if(ch>='A'&& ch <= 'Z')
{
	cout << "U";
}
else
{
	cout << "I";
}

return 0;

}

#2

this code will pass all testcases

there is no problem in this