#include<stdio.h>
#include<stdlib.h>

int main(int argc, char *argv[])
{
    int year=0;
   
    printf("請輸入西元年分:");
    scanf("%d", &year);
   
    if(year % 4 !=0)
    printf("a normal year\n",year);
   
    else if(year % 100 ==0)
    {
    if(year % 400 ==0)
    printf("a leap year\n",year);
    else
    printf("%a normal year\n",year);
    }
    else
    printf("a leap year\n",year);
    
    printf("\n");
    return 0;
}