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#include<bits/stdc++.h>
using namespace std;
int main(){
int a,b,c;
cin>>a>>b>>c;
if(c%40&&c%100!=0||c%4000){
if(a2&&b28){
cout<<a<<'/'<<"29"<<'/'<<c;
}
else if(b31){
cout<<a+1<<'/'<<"1"<<'/'<<c;
}
else if((b30)&&a4||a6||a9||a11){
cout<<a+1<<'/'<<"1"<<'/'<<c;
}
else if(a12&&b31){
cout<<"1/1/"<<c+1;
}
else if(a2&&b29){
cout<<"3/1/"<<c;
}
else{
cout<<a<<'/'<<b+1<<'/'<<c;
}
}
else if(c%4!=0){
if(b31&&a!=12){
cout<<a+1<<'/'<<"1"<<'/'<<c;
}
else if((b30)&&a4||a6||a9||a11){
cout<<a+1<<'/'<<"1"<<'/'<<c;
}
else if(a12&&b31){
cout<<"1/1/"<<c+1;
}
else if(a2&&b28){
cout<<a+1<<'/'<<"1"<<'/'<<c;
}
else{
cout<<a<<'/'<<b+1<<'/'<<c;
}
}
return 0;
}