Consider the following arrangement that has some missing letters: abab_b_bcb_dcdcded_d The missing letters…
Consider the following arrangement that has some missing letters:
abab_b_bcb_dcdcded_d
The missing letters which complete the arrangement are
a, b, c, d
a, b, d, e
a, c, c, e
b, c, d, e
Solution
Filling the blanks to make a consistent pattern: abab(a)b(c)bcb(c)dcdcded(e)d. The series builds in overlapping groups of repeated letter pairs. The four missing letters in order are a, c, c, e.