Russian soldiers

A line of Russian soldiers stands in front of a huge rectangular hole in

the ground.

The Sergant commands to the first soldier in the line:
-- "Private Ivanov!"
-- "Yes, sir!" Replied the soldier who is standing like this:"




                           O
                          -+-
                         | | |
                          | |
                          | |





-- "Jump!!"
Then, the soldier jumps into the hole.

The sergant commands to the next soldier:
-- "Private Pyetrov!!"
-- "Yes, sir!" Who is standing like this:




                          | O
                           -|-
                            | |
                           | |
                           | |





-- " Jump!"

Again, the soldier jumps and falls into the hole.

The sergant commands again:
-- " Private Sidorov!!"
-- " Yes, sir!" Who is standing like this:




                           O
                          -|----
                         | |
                        __| |
                            |





At this point, a colonel arrives on a car. The Colonel, very angry,
comes
up to the Sergant and yells: "Comrad Sergant, how many times do I have
to
tell you: STOP PLAYING TETRIS WITH THE SOLDIERS !!!"