#include <stdio.h>

int main(void) {
	int year,eto;
	scanf("%d",&year);
	eto=(year-1900)%12;
		switch(eto){
			case 0:
			printf("干支は子");
			break;
			case 1:
			printf("干支は丑");
			break;
			case 2:
			printf("干支は寅");
			break;
			case 3:
			printf("干支は卯");
			break;
			case 4:
			printf("干支は辰");
			break;
			case 5:
			printf("干支は巳");
			break;
			case 6:
			printf("干支は午");
			break;
			case 7:
			printf("干支は未");
			break;
			case 8:
			printf("干支は申");
			break;
			case 9:
			printf("干支は酉");
			break;
			case 10:
			printf("干支は戌");
			break;
			case 11:
			printf("干支は亥");
			break;
			default:
			printf("入力は無効");
			break;
		}
	return 0;
}