public static void Main()
for (int H = 1; H<=52; H++)
int north = (A*G) + D + (H*2) + 2;
int east = (A*G) - (E*2) + 1;
if(north == 945 && east == 520 &&( C - B- G) == 16 &&( E + F + G)==55)
Console.WriteLine($"D={D} E={E} F={F} G={G} N 52° 18.{north:D3} E 20° 58.{east:D3},N 52° 18.{north:D3},E 20° 58.{east:D3}");