First letter of each group differs by 2 letters. Second letter of each group differs by 2 letters. Third letter of each group differs by 2 letters. All the letters...
First letter of each group differs by 5 letters in the backward direction. Second letter of each group differs by 2 letters in the forward direction. Third letter of each...
The first letter of subsequent groups has a difference of 4, 5 and 6 places respectively, whereas the second letter of the subsequent groups has a difference of 5, 6...
The first number in the terms follow the sequence +12, +22, +32, +42, ........ The second letter of each group differs by 3 letters in the forward direction. Third letter...