import java.util.*;
public class Kelet_Rishon {
    static Scanner reader =new Scanner(System.in);
    public static void main(String[] args){
    int day,month,year;
    boolean yok,mok,dok;
    print("Choose a day: ");
    day=reader.nextInt();
    print("Choose a month: ");
    month=reader.nextInt();
    print("Choose a year: ");
    year=reader.nextInt();
    switch(day) {
    case 1: dok=true;
    break;
    case 2: dok=true;
    break;
    case 3: dok=true;
    break;
    case 4: dok=true;
    break;
    case 5: dok=true;
    break;
    case 6: dok=true;
    break;
    case 7: dok=true;
    break;
    case 8: dok=true;
    break;
    case 9: dok=true;
    break;
    case 10: dok=true;
    break;
    case 11: dok=true;
    break;
    case 12: dok=true;
    break;
    case 13: dok=true;
    break;
    case 14: dok=true;
    break;
    case 15: dok=true;
    break;
    case 16: dok=true;
    break;
    case 17: dok=true;
    break;
    case 18: dok=true;
    break;
    case 19: dok=true;
    break;
    case 20: dok=true;
    break;
    case 21: dok=true;
    break;
    case 22: dok=true;
    break;
    case 23: dok=true;
    break;
    case 24: dok=true;
    break;
    case 25: dok=true;
    break;
    case 26: dok=true;
    break;
    case 27: dok=true;
    break;
    case 28: dok=true;
    break;
    case 29: dok=true;
    break;
    case 30: dok=true;
    break;
    case 31: dok=true;
    break;
    default: dok=false;


    }
    switch(month) {
    case 1: mok=true;
    break;
    case 2: mok=true;
    break;
    case 3: mok=true;
    break;
    case 5: mok=true;
    break;
    case 4: mok=true;
    break;
    case 6: mok=true;
    break;
    case 7: mok=true;
    break;
    case 8: mok=true;
    break;
    case 9: mok=true;
    break;
    case 10: mok=true;
    break;
    case 11: mok=true;
    break;
    default: mok=false;
    }
    switch(year/100) {
    case 19: yok = true;
    case 20: yok = true;
    break;
    default: yok=false;
    }
    if(yok&&mok&&dok) {
    	print("The date is good");
    }
    else {
    	print("The date is not good");
    }