#include <cstdio>
int main(){
    const int days[12]={31,28,31,30,31,30,31,31,30,31,30,31};
    int y,m,d,uru;
    scanf("%d/%d/%d",&y,&m,&d);
    d=d+2;
    if(m==2){
        uru=0;
        if(y%4==0)uru=1;
        if(y%100==0)uru=0;
        if(y%400==0)uru=1;
    }

    if((m!=2 && d>days[m-1])||(m==2 && d>days[2-1]+uru)){
        d=d-days[m-1];
        if(m==2)d=d-uru;
        m=m+1;
        if(m>12){y++;m=1;}
    }
    
    
    //出力
    printf("%4d/%02d/%02d \n",y,m,d);
}