#include<cstdio>
const int Galleon=17*29;
const int sickle=29;
int main(){
int a1,b1,c1;
int a2,b2,c2;
scanf("%d.%d.%d",&a1,&b1,&c1);
scanf("%d.%d.%d",&a2,&b2,&c2);
int price=a1*Galleon+b1*sickle+c1;
int money=a2*Galleon+b2*sickle+c2;
int change=money-price;
if(change<0){
printf("-");
change=-change;
}
printf("%d.%d.%d\n",change/Galleon,change%Galleon/sickle,change%sickle);
return 0;
}