What letter comes next in the series?
Example: AABBCCD
The next letter would be D.
1) TWTFS
2) IVXLC
3) OTTFFSS
4) ASDFG
5) JFMAMJJ
6) ZXYWXVW
7) WLCNIT
S - Sunday
D - Roman Numerals
E for Eight
H - look at your keyboard's middle row
A for August
U - down 2 letters then up 1