Locate cell vertically adjacent to another cell based on cell values

In column A, the data entered from a pull-down menu ranges from values of A to Z. I'm trying to find all instances where one cell contains in the vertical cell next to it a specific combination such as "B" and "L." For example, the column may show

A
P
Y
B
L
S

In advance, I appreciate your help.

Sorry.

I'd like Excel to lead me to all instances where B is in a cell immediately above or below L.

Let me present it this way:

The following is listed in column A:

Tree
Sky
Bird
Leaf
Rock
Tree
Tree

I'm trying to conduct a search of the spreadsheet to find all instances where "Bird" comes just before the word "Leaf" as it does in the example.