#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    int a,b,c;
    int days[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31};
    scanf("%4d/%2d/%2d",&a,&b,&c);
    if(a%4==0&&a%100!=0||a%400==0)  days[2]++;
    c+=2;
    if((c-1)/days[b]>0) c-=days[b],b++;
    if(b==13) b=1,a++;
    printf("%04d/%02d/%02d\n",a,b,c);
    return 0;
}