// editor2
#include <stdio.h>
int main()
{
    int m;
    scanf("%d",&m);
    
    if(m<=0 || m>12)
    {
        printf("Invalid input");
        return 0;
    }
    switch(m){
        case 1: case 3: case 5: case 7: case 8: case 10: case 12:
        printf("31 days\n");
        break;
        case 2:
        printf("28 days(29 in leap year"));
        break;
        case 4: case 6: case 9: case 9: case 11:
        printf("30 days\n");
        break;
        return 0;
    }