Hi, I am a galazy user and I want to trim exact sequences (not the location) from 5' end. Is there any tool I can use for this?

For example,

AATGATACGGCGAC­CACCG  AACACTGCGTTTGCTGGCTTTGATG
From this sequence, I want to remove AATGATACGGCGAC­CACCG,
so I can get    "AACACTGCGTTTGCTGGCTTTGATG" only.

If I use trim sequences or FASTX trimmer, then it will be trimmed absolute position.
It would be great help. Thank you so much!

Best,
 
Seung Hee