#include <stdio.h>

int main(){
	int a;
	scanf("%d" ,&a);
	a = (a-1900)%12;
	

switch( a ){
	case 0:
	     printf("子");
	     break;
	case 1:
	     printf("丑");
	     break;
	case 2:
	     printf("寅");
	     break;
	case 3:
	     printf("卯");
	     break;
	case 4:
	     printf("辰");
	     break;
	case 5:
	     printf("巳");
	     break;
	case 6:
	     printf("午");
	     break;
	case 7:
	     printf("未");
	     break;
	case 8:
	     printf("申");
	     break;
	case 9:
	     printf("酉");
	     break;
	case 10:
	     printf("戌");
	     break;
	case 11:
	     printf("亥");
	     break;
	}
}