#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<(n);i++)
#define MOD 1000000007
#define INF 0x3f3f3f3f
#define INFL 0x3f3f3f3f3f3f3f3f
#define EPS (1e-10)
using namespace std;
typedef long long ll;
typedef pair<int,int>P;

bool is_uruu(int y){
	return y%4==0&&(y%100!=0||y%400==0);
}
int month[]{0,31,28,31,30,31,30,31,31,30,31,30,31};
signed main(){
	int y,m,d;scanf("%d/%d/%d",&y,&m,&d);
	if(is_uruu(y))month[2]=29;
	d+=2;
	if(d>month[m]){
		d-=month[m];
		m++;
		if(m>12){
			y++;
			m=1;
		}
	}
	printf("%d/%02d/%02d\n",y,m,d);
}