#include<stdio.h>
int main(){
    int Month;
    scanf("%d",&Month);
    switch (Month){
        case 1: printf("31days\n");break;
        case 2: printf("28days(29 days in leap year)\n");break;
        case 3: printf("31days\n");break;
        case 4: printf("30days\n");break;
        case 5: printf("31days\n");break;
        case 6: printf("30days\n");break;
        case 7: printf("31days\n");break;
        case 8: printf("31days\n");break;
        case 9: printf("30days\n");break;
        case 10: printf("31days\n");break;
        case 11: printf("30days\n");break;
        case 12: printf("31days\n");break;
        default:
        printf("Invalid input\n");
        break;
    }
    return o;
}