#include <bits/stdc++.h>
#define MOD 998244353
#define mod 1000000007
#define ll long long
#define ull unsigned long long
#define ui unsigned int
#define range(i,a,b) for (int i = a; i <= b; i++)
#define round(i,a,b) for (int i = a; i < b; i++)
#define rrange(i,a,b) for (int i = a; i >= b; i--)
#define rround(i,a,b) for (int i = a; i > b; i--)
using namespace std;
int HH,MM,SS,H,M,S,n,sum = 0;
int f(int a,int b,int c)
{
    return a * 3600 + b * 60 + c;
}
int main()
{
	scanf("%d:%d:%d\n%d:%d:%d\n%d",&HH,&MM,&SS,&H,&M,&S,&n);
	cout << (f(H,M,S) - f(HH,MM,SS)) * 10 << endl;
	return 0;
}