ARCPY using the arcpy.da.UpdateCursor

[CornJulio]

SO this is ther Error I get now:

Error:
1
2Traceback (most recent call last):
3

  File "C:\Users\hawkinle\Desktop\STDTAS\Fishnet2.py", line 9, in <module>
    rightPart = ["A","B","C"][row[0] % 4]
IndexError: list index out of range
[Finished in 14.4s]

it appears to have added to the Table only the Values 1B and 1 C.  No 1A