I is the next letter.
l
K
The next term is ' D '.
To provide necessary context, the original question was "What letter comes next in this sequence? WLCNIT_" Notice the first letter of each word in that question. The answer is S, corresponding to "sequence."
I is the next letter.
A
a
s
The next letter is U.
l
A
The next letter is U.
HS
K
p
It is: Y