#include<iostream>
using namespace std;
int main(){
    char p;
    cin>>p;
    if(p>='0' && p<='9'){
        cout<<"number";
    }
    else if(p>='a' && p<='z'){
        cout<<"alpha";
    }
    else{
        cout<<"special char"
    }
    return 0;
}// editor1