/* Programmed by Kurt Nørmark, March 2003 */

#include <stdio.h>

enum month {jan = 1, feb, mar, apr, may, jun, jul, 
           aug, sep, oct, nov, dec}; 
typedef enum month month;

month previous_month(month m){
  int result;
  if (m == 1)
     result = 12;
   else 
     result = m - 1;

  return (month)result;
}  

void prnt_month(month m){
  switch (m) {
    case jan: printf("January");
       break;
    case feb: printf("February");
       break;
    case mar: printf("March");
       break;
    case apr: printf("April");
       break;
    case may: printf("May");
       break;
    case jun: printf("June");
       break;
    case jul: printf("July");
       break;
    case aug: printf("August");
       break;
    case sep: printf("September");
       break;
    case oct: printf("October");
       break;
    case nov: printf("November");
       break;
    case dec: printf("December");
       break;
  }
}   

int main(void){
  
  month m;
  int i;
  
  for(m = dec, i = 1;  i <= 12; m = previous_month(m), i++){
    prnt_month(m); printf("\n");
  }
}