答案

#include<iostream>
using namespace std;
int main(){
char a;
cin>>a;
if (a >= 'A' && a <= 'Z'){
cout<<"A";
}
else if(a >= 'a' && a <= 'z'){
cout<<"a";
}
else if(a >= '0' && a <= '9'){
cout<<"0";
}
else{
cout<<"other";
}
return 0;
}