#include <bits/stdc++.h>
#define rep(i,n) for(int i=0; i<(n); i++)
using namespace std;
typedef long long ll;

int main(){
	int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
	int y,m,d; scanf("%d/%d/%d", &y,&m,&d);
	if(y%400==0){
		day[2]++;
	} else if(y%100!=0 and y%4==0){
		day[2]++;
	}
	d+=2;
	if(day[m]<d){
		d=(d%day[m]);
		m++;
		if(m==13){m=1; y++;}
	}
	printf("%04d/%02d/%02d", y,m,d);
}