Return TRUE if 1st 2 characters in text are alpha values

Using Excel 2007.

In Column A, (formatted as text), I have various text values, some beginning with 2 alpha values followed by several numeric values (i.e. AB123456), others contain just pure numbers (012345). In column B, i would like to create an IF statement that will return a TRUE if the 1st 2 characters in the cell in A are alpha values.

So, if my Column A looked like below, Column B would return:

A	B
AB123456	TRUE
0987654	FALSE
ZY987654	TRUE
123789	FALSE