int minute(int x,int y,int z,int xx,int yy,int zz )
{
    int result=0;
    result+=(60-y-1)*60+60-z;
    result+=(xx-x-1+12)*3600;
    result+=yy*60+zz;
    return result;
}
int main()
{
    int t=0;
    int a,b,c,d,e,f;
    while(1)
    {

        scanf("%d%d%d%d%d%d",&a,&b,&c,&d,&e,&f);
        if(a==0&&b==0&&c==0&d==0&&e==0&f==0)
        {
            break;
        }
        t++;
        if(t!=1)
        {
            printf("\n");
        }
        printf("%d",minute(a,b,c,d,e,f));


    }


	return 0;
}
