We place the missing letters:
K H L J | I M K M | N L N K | M O L
So blanks are at:
1st, 2nd, 3rd, 4th positions → 5 letters total.
Let’s analyze column-wise patterns.
First letters of each group
, , N , M
So sequence: ?, ?, N(14), M(13)
This suggests decreasing by 1:
N → M → L → K → J → I
So first blanks likely:
I, L
So we get:
I K H L J | L I M K M | N L N K | M O L
Check remaining pattern
Now look at 3rd group last letter:
N L N K _ → should follow pattern similar to earlier groups.
Check 5-letter pattern:
Each group is shifting alphabetically in a structured way:
Group1: I K H L J
Group2: L I M K M
Group3: N L N K O
Group4: M O L P
So completing blanks:
3rd blank = O
4th blank = P
Final sequence:
I K H L J | L I M K M | N L N K O | M O L P
So missing letters are:
I L J O P