#include <iostream>
#include <cstdlib>
#include <cmath>
using namespace std;
int main()
{
    float h,m,s,h1,m1,h2,m2,s2,h3,m3;
    cin>>h;
    cin>>m;
    cin>>s;
    h1=h*3600;
    m1=m*60;
    cin>>h2;
    cin>>m2;
    cin>>s2;
    h3=h2*3600;
    m3=m2*60;
    cout<<"dt einai:"<<abs(h1-h3)+abs(m1-m3)+abs(s-s2)<<endl;
    
    



    system("PAUSE");
    return 0;
}