#include<string.h>
int main()
{
int i;
char *day[7]={"星期天","星期壹","星期二","星期三","星期四","星期五","星期六"};
scanf("%d", &i);
if(i<0||i>6)
{printf("error");}
else
{printf("%s", day[i]); }
retunr 0;
}