// editor2
#include<stdio.h>
int main(){
    int month;
    int year;
    scanf("%d%d",&month ,&year);
    if(month<1 || month>12){
        printf("Invalid input\n");
        return 0;
    }
    int days_in_month[]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    if(month==2){
        int is_leap==((year%4==0)&&(year%100!=0))||(year%400==0);
        if(is_leap){
            days_in_month[2]=29;
        }
    }
    printf("%d days\n",days_in_month[month]);
    
    return 0;
}