f, s, e, t
First initials of even numbers
a square
y
Normally it is S in the alphabet
64
The answer is a Nonagon. Hope this helps!!
The sequence "TFSETT" appears to involve the letters of the English alphabet, but without additional context or a specific pattern explained, it's challenging to determine the next letter definitively. One possibility is that it could follow a pattern based on the English alphabet or a code. If there is a specific rule or pattern being used, please provide that for a more accurate answer. Otherwise, it is not possible to ascertain the next letter in the sequence.
JSUN
D
M and N
12
2
122
2310.
75
256
16.
1