Seven letters G, N, T, Y, V, Q, C are selected and arranged in the dictionary order. Another two letters are selected and placed in between these seven letters so that
i) the position of the middle letter is not altered after the inclusion of these two letters.
ii) one of the two selected letters become the middle one for the right most five letters.
iii) for the left most five letters G is the middle letter and no two letters are consecutive. Then the two letters included are