Two letters having the same position number in both the normal order and the reverse order are called corresponding letters.
A and Z are corresponding letters. Similarly, B and Y; C and X; D and W; E and V; F and U; G and T; H and S; I and R; J and Q; K and P; L and O; M and N are pairs of the corresponding letters. Further, A and Z are consecutive letters also. Similarly, M and N are consecutive as well as corresponding letters. Except these two pairs, no other pair of letters can be both consecutive as well as corresponding letters simultaneously.