#include <iostream>
 
//write your age
int main()
{
    int age{0};
    std::cin >> age;
 
    if (age < 0) {
        std::cout <<"This age is not acceptable.";
        return -1;
    }
 
    switch(age) {
        case 0 ... 5:
            std::cout <<"You are very young.";
            break;
        case 6 ... 12:
            std::cout <<"You are a child.";
            break;
        case 13 ... 17:
            std::cout <<"You are a teenager.";
            break;
        case 18 ... 69:
            std::cout << "You are an adult.";
            break;
        case 70 ... 99:
            std::cout << "You are a senior.";
            break;
        default:
            std::cout << "You are very old.";    
    }
 
 
    return 0;
}