Editing Polybius square (section)

=== Method 2 ===
A more complicated method involves a [[Bifid cipher]] without a key (or, in other words, with a key of plain alphabet):
{| class="wikitable"
|-
! 
! 1 !! 2 !! 3 !! 4 !! 5
|-
! 1
| A || B || C || D || E
|-
! 2
| F || G || H || I/J ||K
|-
! 3
| L || M || N || O || P
|-
! 4
| Q || R || S || T || U
|-
! 5
| V || W || X || Y || Z
|}
The message is transformed into coordinates on the Polybius square, and the coordinates are recorded vertically:
{| class="wikitable"
|+
!Letter
|s
|o
|m
|e
|t
|e
|x
|t
|-
!Horizontal coordinate
|3
|4
|2
|5
|4
|5
|3
|4
|-
!Vertical coordinate
|4
|3
|3
|1
|4
|1
|5
|4
|}


Then the coordinates are read row by row:
 34  25  45  34  43  31  41  54  
Next, the coordinates are converted into letters using the same square:
{| class="wikitable"
|+
!Horizontal coordinate
|3
|2
|4
|3
|4
|3
|4
|5
|-
!Vertical coordinate
|4
|5
|5
|4
|3
|1
|1
|4
|-
!Letter
|s
|w
|y
|s
|o
|c
|d
|u
|}
Thus, after encryption, we get "swysocdu".