Tetromino-alphabet

This alphabet can be found on the tetromino-site of Casper and Rocky, made to participate in the ThinkQuest-competition..
Visit this wonderful site !

Use 4 tetromino sets to fill the following letters.
( Each letter consists out of 80 empty squares )

Equal tetrominos shouldn't touch each other, not with their sides and not with their corners.

Puzzles

Solutions