
# random DNA generator http://www.faculty.ucr.edu/~mmaduro/random.htm


def fwdp(lst):
    primers = []
    for s in lst:
        primers.append(s[:20])
    return primers







seqlist = ["TTAGTGTAGGTTCTGACCGATACCTGCTTCGTTGAGAACTCACAATTTTACAACTGGGGACATAATCCCTACGCCCATCATCTACTCGCGTCCCTGTGGCTCCAGTTCATGTAATGGGAGAGTATCCTCCACAAGATCTAGTGCTATGGTGGTATAGTAAGCTCGTACTGTGGTAGACGCGACACGGGTAGGACCATCAG",
           "TAATAAGGATAGTGCGAAAGCTCACAGACCACTGCCTATAGGGGGTGCTTACTTTTACAAAAAGCGACTGTCAGTATAACCCCACGAGGATTCGAAAAGGTGAACCGACCCAGACGATCCGGAGGCACGGGCCTCAAAGCCGCGACACGACGGCTGTCGGCCGGTAACAGTAACCCCGGAGTGAACTCCTATGGGGCTGG",
           "ATAGAACAGCCCTGGTGGGCCCCATCAGCAACCCGAATACGTGGCTTTTCGGGAGGCGGCCGGAGGGGCGATGTCTTCCACTATTCGAGGCCGTTCGTTAATACTTGTTGCGTTCCTAGCCGCTATATTTGTCTCTTTGCCGACTAATGTGGACAAGCACACCATAGCCATTTATCGGAGCGCCTCGGAATACGGTATGA"]




print fwdp(seqlist)
