#include <stdio.h>
void main() {
  int tot,leap,dat,yy;
  printf("give the the year -->"); scanf("%d",&yy);
  leap=(yy-1)/4 - (yy-1)/100 + (yy-1)/400;
  tot=(yy-1)+leap; dat=(1+tot)%7; printf("%d January 1st is ",yy);
  switch (dat) {
  case 0: printf("Sun\n"); break;
  case 1: printf("Mon\n"); break;
  case 2: printf("Tue\n"); break;
  case 3: printf("Wed\n"); break;
  case 4: printf("Thu\n"); break;
  case 5: printf("Fri\n"); break;
  case 6: printf("Sat\n"); break;
  }
}