crunch wordlist generation with all combinations

I'm trying to generate a wordlist in order to use it to bruteforce my own Truecrypt container. I do know parts of the password, its built up using blocks of other known passwords to increase length, but I forgot in which order the blocks were used and if some blocks weren't used at all. Example "blocks" separated with space: dog cat bird xyz cow1 lion8 What I would like to do is create a wordlist containing each possible combination of these blocks. E.g dog cat dogcat catdog bird dogbird catbird birdcat birddog dogcatbird catdogbird xyz dogcatbirdxyz cow1 xyzcow1dogcat xyzcow1dogcatbird catdogbirdxyzcow8 lion8 catdogbirdxyzcow1lion8 lion8catdogbirdxyzcow1 dogcatbirdxyzcow1lion8 cow1birddogcatxyzlion8 cow1lion8birddogcatxyz ... So far I've tried to utilize a tool called crunch: http://www.irongeek.com/i.php?page=backtrack-r1-man-pages/crunch But the challenge seems to be how one should generate combinations of shorter combinations, not including all known blocks, example: dogcat only includes 2 blocks. Perhaps someone know crunch better than me, or if I should use another tool or combination of tools?