#include <stdio.h> int main() { int a,b; scanf("%2d%*d%d",&a,&b); if(b==2) { if((a%4==0&&(a%100)!=0)||(a%400==0)) printf("29天",a,b); else printf("28天",a,b); } if(b==1||b==3||b==5||b==7||b==8||b==10||b==12) printf("31",a,b); if(b==4||b==6||b==9||b==11) printf("30",a,b); }