I have been provided the following short puzzle and need help understanding the answer.
Complete the following letter series:
I filled it like this: aaabcaabbbcabbccca
I had noticed there could be a pattern constructed using blocks of 7 sequential letters (
However, I have been told that the correct answer is aaabcaabbbccbbccca, which differs from my answer in only one place. Please note, I am not sure about the answer. It was taken only as a reference. So please let this undermine your approach.
Can anyone help me understand what makes this answer is correct?