B1037

#include <stdio.h>

const int Galleon = 17*29;      // 一个加伦可以兑换的纳特数
const int Sickle = 29;          // 一个西可可以兑换的纳特数 
int main(){
    int a1,b1,c1;
    int a2,b2,c2;

    scanf("%d.%d.%d%d.%d.%d", &a1,&b1,&c1, &a2, &b2,&c2);
    int price = a1*Galleon + b1*Sickle + c1;
    int money = a2*Galleon + b2*Sickle + c2;
    int change = money-price;   // 找零的钱

    if (change < 0){
        printf ("-");
        change = -change;
    }

    //转换成原先的格试
    printf("%d.%d.%d", change/Galleon, (change%Galleon)/Sickle, change%Sickle); 
    return 0;
}