#include <stdio.h>
int main(){
    scanf("%d" ,& Month);
    switch (Month) {
        case 1:
        printf("31 days\n");
        break;
        case 2:
        printf("31 days (29 in leap years)\n");
        break;
        case 3:
        printf("31 days\n");
        break;
        case 4:
        printf("30 days\n");
        break;
        case 5:
        printf("31 days\n");
        break;
        case 6:
        printf("30 days\n");
        break;
        case 7:
        printf("31 days\n");
        break;
        case 8:
        printf("31 days\n");
        break;
          case 9:
        printf("30 days\n");
        break;
        case 10:
        printf("31 days\n");
        break;
         case 11:
        printf("30 days\n");
        break;
         case 12:
        printf("31 days\n");
        break;
        default:
        printf("Invalid input");
        break;
    }
    return 0;
}