main.cpp

#include <iostream>

using namespace std;

int main() {

    int X;

    do {
        cin >> X;
    } while (X < 1 || X > 12);

    switch (X) {
    case 1:
        cout << "January" << endl;
        break;
    case 2:
        cout << "February" << endl;
        break;
    case 3:
        cout << "March" << endl;
        break;
    case 4:
        cout << "April" << endl;
        break;
    case 5:
        cout << "May" << endl;
        break;
    case 6:
        cout << "June" << endl;
        break;
    case 7:
        cout << "July" << endl;
        break;
    case 8:
        cout << "August" << endl;
        break;
    case 9:
        cout << "September" << endl;
        break;
    case 10:
        cout << "October" << endl;
        break;
    case 11:
        cout << "November" << endl;
        break;
    default:
        cout << "December" << endl;
    }

    return 0;
}