#include <stdio.h>
int main()
{
int n;
scanf("%d",&n);
switch(n)
{
case 0:
printf("SUN");
break;
case 1:
printf("MON");
break;
case 2:
printf("TUE");
break;
case 3:
printf("WED");
break;
case 4:
printf("THU");
break;
case 5:
printf("FRI");
break;
case 6:
printf("SAT");
break;
default:
pritnf("Error");
break;
}
}