OK

using namespace std;

int main() {
char ch;
cin >> ch;

if (islower(ch)) {
    cout << "a" << endl;
} else if (isupper(ch)) {
    cout << "A" << endl;
} else if (isdigit(ch)) {
    cout << "0" << endl;
} else {
    cout << "other" << endl;
}

return 0;

}